Sarthaks eConnect | Largest Online Education Community - Recent questions and answers in JEE
https://www.sarthaks.com/qa/jee
Managed by Sarthaks eConnectAnswered: Which of the following non-metal could not be oxidised to its highest possible oxidation state by concentrated HNO3
https://www.sarthaks.com/796279/which-following-metal-could-oxidised-highest-possible-oxidation-state-concentrated-hno3?show=796302#a796302
Plz provide options.Chemistryhttps://www.sarthaks.com/796279/which-following-metal-could-oxidised-highest-possible-oxidation-state-concentrated-hno3?show=796302#a796302Sat, 06 Jun 2020 07:52:52 +0000Answered: r-c=o-nh2 + h2o
https://www.sarthaks.com/791915/r-c-o-nh2-h2o?show=795551#a795551
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=6872318325586794841" style="height:317px; width:600px">.................</p>Organic compounds containing oxygenhttps://www.sarthaks.com/791915/r-c-o-nh2-h2o?show=795551#a795551Fri, 05 Jun 2020 16:01:46 +0000What is the rearranged carbocation structure of HO-CH2-CH+ -CH2-Ph?
https://www.sarthaks.com/794582/what-is-the-rearranged-carbocation-structure-of-ho-ch2-ch-ch2-ph
Some basic principles of organic chemistryhttps://www.sarthaks.com/794582/what-is-the-rearranged-carbocation-structure-of-ho-ch2-ch-ch2-phFri, 05 Jun 2020 04:56:17 +0000Show rearrangement of given carbocation with explaination?
https://www.sarthaks.com/792506/show-rearrangement-of-given-carbocation-with-explaination
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=106992999961495169" style="height:218px; width:600px"></p>Some basic principles of organic chemistryhttps://www.sarthaks.com/792506/show-rearrangement-of-given-carbocation-with-explainationWed, 03 Jun 2020 06:42:57 +0000how do you calculated OC and x?
https://www.sarthaks.com/792214/how-do-you-calculated-oc-and-x
Physicshttps://www.sarthaks.com/792214/how-do-you-calculated-oc-and-xTue, 02 Jun 2020 16:11:55 +0000Answered: a circuit of 1 resistance and 0.01H inductance is connected a 200 volt line of frequency 50 cycles/second .Calculate lag in phase between AV & current
https://www.sarthaks.com/789835/circuit-resistance-inductance-connected-frequency-cycles-second-calculate-between-current?show=791621#a791621
<p>Answer here:</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=13699815570197678639" style="height:877px; width:600px"></p>Current electricityhttps://www.sarthaks.com/789835/circuit-resistance-inductance-connected-frequency-cycles-second-calculate-between-current?show=791621#a791621Tue, 02 Jun 2020 07:51:14 +0000Answered: calculate the % of free SO3 in oleum that is labelled as 106%
https://www.sarthaks.com/789989/calculate-the-of-free-so3-in-oleum-that-is-labelled-as-106?show=791058#a791058
SO3+H2O-->H2SO4<br />
<br />
80-18<br />
<br />
x-6<br />
<br />
x=80/3<br />
<br />
therefore, SO3=26.67P - block elementshttps://www.sarthaks.com/789989/calculate-the-of-free-so3-in-oleum-that-is-labelled-as-106?show=791058#a791058Mon, 01 Jun 2020 16:29:14 +0000Answered: By heating ammonium dichromate, a colourless gas is evolved. Which of the following compounds would produce the same gas on heating ?
https://www.sarthaks.com/789933/heating-ammonium-dichromate-colourless-evolved-which-following-compounds-produce-heating?show=791057#a791057
(NH4)2Cr2O7--->N2+Cr2O3+H2OCo-ordinations compoundhttps://www.sarthaks.com/789933/heating-ammonium-dichromate-colourless-evolved-which-following-compounds-produce-heating?show=791057#a791057Mon, 01 Jun 2020 16:22:52 +0000Answered: which is not correct about the schottky defect
https://www.sarthaks.com/790552/which-is-not-correct-about-the-schottky-defect?show=790590#a790590
<p><span style="color:#000000">If in an ionic crystal of type A+B− an equal number of cations and anions are missing from their lattice sites so that electrical neutrality, as well as stoichiometry, is maintained, then, this defect is called a Schottky Defect. The presence of holes causes the density of the crystal to decrease. It is a vacancy defect (due to missing ions) and also a stoichiometric defect, as the ratio of the number of cations and anions remains the same. The energy needed to form a Schottky defect is very less but the production of lattice defects of Schottky is an endothermic process. Hence the lattice energy increases. The defect increases the electrical conductivity of the solid due to a migration of the ions into the holes.</span></p>JEEhttps://www.sarthaks.com/790552/which-is-not-correct-about-the-schottky-defect?show=790590#a790590Mon, 01 Jun 2020 11:04:08 +0000Answered: The no of divisors of the form of the integer 240 is
https://www.sarthaks.com/790074/the-no-of-divisors-of-the-form-of-the-integer-240-is?show=790081#a790081
240 =24.3.5 <br />
<br />
.'. Total number of divisors = (4 + 1)(2)(2) = 20 <br />
<br />
Out of these 2, 6, 10, and 30 are of the form 4n + 2<br />
<br />
Therefore , number of divisors = 4.Binomial theoremhttps://www.sarthaks.com/790074/the-no-of-divisors-of-the-form-of-the-integer-240-is?show=790081#a790081Mon, 01 Jun 2020 06:29:14 +0000Answered: A 100 pF capacitor is connected to a 230 V. 50Hz AC source. The rms value of conduction current will be
https://www.sarthaks.com/789782/100-capacitor-is-connected-to-230-50hz-ac-source-the-rms-value-of-conduction-current-will-be?show=789786#a789786
<p><span style="color:#000000">RMS value of conduction current, <span class="math-tex">\(I=\frac{V}{X_C}\)</span><br>where, <span class="math-tex">\(X_C\)</span>=capacitative reactance.<br><span class="math-tex">\(X_C=\frac{1}{\omega C}\)</span></span></p><p><span style="color:#000000"><span class="math-tex">\(I=V\omega C=230V\times300rad/s\times10^{-10}F\\I=6.9\times10^{-6}A\)</span></span></p>Current electricityhttps://www.sarthaks.com/789782/100-capacitor-is-connected-to-230-50hz-ac-source-the-rms-value-of-conduction-current-will-be?show=789786#a789786Mon, 01 Jun 2020 04:52:02 +0000Answered: Compare acidic strength with proper explaination?
https://www.sarthaks.com/788182/compare-acidic-strength-with-proper-explaination?show=789499#a789499
<p>This is the answer to your question:</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=17169239047370982580" style="height:396px; width:600px"></p>Some basic principles of organic chemistryhttps://www.sarthaks.com/788182/compare-acidic-strength-with-proper-explaination?show=789499#a789499Sun, 31 May 2020 16:20:10 +0000let z1 and z2 be two non zero complex numbers then the maximum value of z1(z2bar)+(z1bar)z2/(mod z1z2) is
https://www.sarthaks.com/789212/let-z1-and-be-two-non-zero-complex-numbers-then-the-maximum-value-of-z1-z2bar-z1bar-z2-mod-z1z2
Complex number and Quadratic equationshttps://www.sarthaks.com/789212/let-z1-and-be-two-non-zero-complex-numbers-then-the-maximum-value-of-z1-z2bar-z1bar-z2-mod-z1z2Sun, 31 May 2020 09:57:04 +0000if n is an integer and (1+i(sqrt3))^n+(1-i(sqrt3))^n=2^n+1 cos theta then theta=
https://www.sarthaks.com/789172/if-n-is-an-integer-and-1-i-sqrt3-n-1-i-sqrt3-n-2-n-1-cos-theta-then-theta
if n is an integer and (1+i(sqrt3))^n+(1-i(sqrt3))^n=2^n+1 cos theta then theta=Complex number and Quadratic equationshttps://www.sarthaks.com/789172/if-n-is-an-integer-and-1-i-sqrt3-n-1-i-sqrt3-n-2-n-1-cos-theta-then-thetaSun, 31 May 2020 09:33:34 +0000if n is an integer and (1+i(sqrt3))^n+(1-i(sqrt3))^n=2^n+1 cos theta then theta=
https://www.sarthaks.com/789168/if-n-is-an-integer-and-1-i-sqrt3-n-1-i-sqrt3-n-2-n-1-cos-theta-then-theta
Complex number and Quadratic equationshttps://www.sarthaks.com/789168/if-n-is-an-integer-and-1-i-sqrt3-n-1-i-sqrt3-n-2-n-1-cos-theta-then-thetaSun, 31 May 2020 09:33:05 +0000Answered: if xr=cis(pi/2^r) r=1,2,3,.......alpha then x1x2x3......alpha=
https://www.sarthaks.com/789144/if-xr-cis-pi-2-r-r-1-2-3-alpha-then-x1x2x3-alpha?show=789162#a789162
if n is an integer and (1+i(sqrt3))^n+(1-i(sqrt3))^n=2^n+1 cos theta then theta=Complex number and Quadratic equationshttps://www.sarthaks.com/789144/if-xr-cis-pi-2-r-r-1-2-3-alpha-then-x1x2x3-alpha?show=789162#a789162Sun, 31 May 2020 09:32:11 +0000Answered: (CH3)3CCHO will show tautomerism or not?
https://www.sarthaks.com/788905/ch3-3ccho-will-show-tautomerism-or-not?show=788908#a788908
<p><span style="color:#000000">Tautomerism is a special kind of functional isomerism in which the isomers exist in dynamic equilibrium with each other .It arises due to migration of hydrogen atom from one polyvalent atom to the other within the same molecule .The isomers thus obtained are called tautomers .</span></p><p><span style="color:#000000"> (CH<sub>3</sub>)<sub>3</sub>CCHO do not show tautomerism <strong>due to the absence of α hydrogen atom w.r.t carbonyl group </strong></span></p>Some basic principles of organic chemistryhttps://www.sarthaks.com/788905/ch3-3ccho-will-show-tautomerism-or-not?show=788908#a788908Sun, 31 May 2020 06:58:49 +0000Answered: If two distinct chords, drawn from the point (p,q) on the circle x2+y2 = px + qy, (where pq0) are bisected by the x–axis, then
https://www.sarthaks.com/788042/two-distinct-chords-drawn-from-the-point-the-circle-where-pq0-are-bisected-by-the-axis-then?show=788192#a788192
<p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=11048866987141263626" style="height:528px; width:483px"></span></p><p><span style="color:#000000">Now, B lies on the circle.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=11738767496759634928" style="height:221px; width:342px"></span></p>Co-ordinate geometryhttps://www.sarthaks.com/788042/two-distinct-chords-drawn-from-the-point-the-circle-where-pq0-are-bisected-by-the-axis-then?show=788192#a788192Sat, 30 May 2020 08:09:42 +0000Answered: Number of circles touching the lines 3x+4y–1=0, 4x–5y+2=0 and 6x+8y+3=0 is
https://www.sarthaks.com/787934/number-of-circles-touching-the-lines-3x-4y-1-0-4x-5y-2-0-and-6x-8y-3-0-is?show=788151#a788151
<p><span style="color:#000000">Since 3x+4y-1=0 and 6x+8y+3=0 are parallel and third line 4x-5y+2=0 will intersect them therefore, as shown in the diagram there will be two circles which will touch all the three given lines.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=9343846575070949191" style="height:102px; width:194px"></span></p>Co-ordinate geometryhttps://www.sarthaks.com/787934/number-of-circles-touching-the-lines-3x-4y-1-0-4x-5y-2-0-and-6x-8y-3-0-is?show=788151#a788151Sat, 30 May 2020 07:59:19 +0000Answered: The sum of the intercepts of the plane which bisects the line segment joining (0,1,2) and (2,3,0) perpendicularly is
https://www.sarthaks.com/787966/the-sum-intercepts-the-plane-which-bisects-the-line-segment-joining-and-perpendicularly?show=788149#a788149
Sum of the intercepts=2Co-ordinate geometryhttps://www.sarthaks.com/787966/the-sum-intercepts-the-plane-which-bisects-the-line-segment-joining-and-perpendicularly?show=788149#a788149Sat, 30 May 2020 07:59:14 +0000Answered: Compare the basic strength of the following with proper explaination?
https://www.sarthaks.com/788085/compare-the-basic-strength-of-the-following-with-proper-explaination?show=788102#a788102
Order of basic strength=1-3-4-2 Basic strength decreases dueto the electonegative atoms attached to the ring. Order of electronegativity is O>N>S...............<br />
<br />
.........<br />
<br />
..Some basic principles of organic chemistryhttps://www.sarthaks.com/788085/compare-the-basic-strength-of-the-following-with-proper-explaination?show=788102#a788102Sat, 30 May 2020 07:39:12 +0000Answered: Compare the basic strength with proper explaination?
https://www.sarthaks.com/788086/compare-the-basic-strength-with-proper-explaination?show=788099#a788099
Order of basic strength=1-3-4-2<br />
<br />
Basic strength decreases dueto the electonegative atoms attached to the ring. Order of electronegativity is O>N>S....Some basic principles of organic chemistryhttps://www.sarthaks.com/788086/compare-the-basic-strength-with-proper-explaination?show=788099#a788099Sat, 30 May 2020 07:37:47 +0000A(0,2,3),B(2,−1,5),C(3,0,−3) are vertices of ΔABC. If a, b, c are HG, GS, SH then their increasing order is
https://www.sarthaks.com/788048/a-0-2-3-b-2-1-5-c-3-0-3-are-vertices-of-abc-if-a-b-c-are-hg-gs-sh-then-their-increasing-order-is
Co-ordinate geometryhttps://www.sarthaks.com/788048/a-0-2-3-b-2-1-5-c-3-0-3-are-vertices-of-abc-if-a-b-c-are-hg-gs-sh-then-their-increasing-order-isSat, 30 May 2020 06:30:44 +0000Answered: A solution is prepared by dissolving 0.6g of urea (molar mass = 60 gmol^−1 ) and 1.8g of glucose
https://www.sarthaks.com/787280/a-solution-is-prepared-by-dissolving-0-6g-of-urea-molar-mass-60-gmol-1-and-1-8g-of-glucose?show=787379#a787379
<p><span style="color:#000000">For mixed solutes in the solution, osmotic pressure;</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=14677530237063037873" style="height:184px; width:303px"></span></p>Solutionshttps://www.sarthaks.com/787280/a-solution-is-prepared-by-dissolving-0-6g-of-urea-molar-mass-60-gmol-1-and-1-8g-of-glucose?show=787379#a787379Fri, 29 May 2020 19:02:33 +0000Answered: Height and distance JEE1
https://www.sarthaks.com/787014/height-and-distance-jee1?show=787284#a787284
<p><span style="color:#000000"><strong>Given: </strong>Angle of depression of two consecutive stones when observed from an aeroplane are 30 degree and 60 degree.<br>We have to find the height at which the aeroplane is flying.<br>Consider,</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=14618536358647558749" style="height:324px; width:397px"></span></p><p><span style="color:#000000">Let, AB = h km<br>BC = x km and CD = 1km<br>Consider, right angled triangle ABC,<br>tan60 = AB/BC<br>=> <span class="math-tex">\(\sqrt{3} = \frac{h}{x}\)</span><br>=> <span class="math-tex">\(x = \frac{h}{\sqrt{3}}\)</span> .....(i)<br>In right angled triangle ABD, we have<br>tan30 = AB/BD<br>=> <span class="math-tex">\(\frac{1}{\sqrt3} = \frac{h}{x+1}\)</span><br>=> <span class="math-tex">\(x+1 = \sqrt{3}h\)</span> ....(ii)<br>From(i) and (ii), we get<br><span class="math-tex">\(\frac{h}{\sqrt{3}} + 1 = \sqrt{3}h\)</span><br>=> <span class="math-tex">\(h+\sqrt{3} = 3h\)</span><br>=> <span class="math-tex">\(2h = \sqrt{3}\)</span><br>=> So, the height at which the aeroplane is flying is <span class="math-tex">\(h = \frac{\sqrt{3}}{2} km\)</span></span></p>Trigonometryhttps://www.sarthaks.com/787014/height-and-distance-jee1?show=787284#a787284Fri, 29 May 2020 16:48:55 +0000Height and distance JEE
https://www.sarthaks.com/787010/height-and-distance-jee
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=15542766459112729307" style="height:225px; width:600px"></p><p>A flag is standing vertically on a tower of height b. On a point at a distance a from the foot of the tower, the flag and the tower subtend equal angles. The height of the flag is</p>Trigonometryhttps://www.sarthaks.com/787010/height-and-distance-jeeFri, 29 May 2020 13:47:52 +0000Answered: Problem related to equilivalent resistance
https://www.sarthaks.com/781868/problem-related-to-equilivalent-resistance?show=785117#a785117
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=2097892749049729026" style="height:426px; width:600px">.............m.!!</p>Physicshttps://www.sarthaks.com/781868/problem-related-to-equilivalent-resistance?show=785117#a785117Thu, 28 May 2020 15:55:07 +0000How to solve question 36 and 37
https://www.sarthaks.com/784532/how-to-solve-question-36-and-37
<p><span style="color:#000000">A Circular ring having mass M=4m and radius R is attached to a small smooth ring of mass m kept at point A. The ring is threaded onto a horizontal fixed frictionless wire. </span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=9821133919455728557" style="height:352px; width:600px"></span></p>Rotational motionhttps://www.sarthaks.com/784532/how-to-solve-question-36-and-37Thu, 28 May 2020 11:30:05 +0000Answered: 0.6 ko of acetic acid ,having density 1.06 g /ml ,is dissolved in 1 litre of water.
https://www.sarthaks.com/783288/0-6-ko-of-acetic-acid-having-density-1-06-g-ml-is-dissolved-in-1-litre-of-water?show=783479#a783479
<p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=9520298239591014735" style="height:316px; width:496px"></span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=13416723650207556559" style="height:265px; width:498px"></span></p><p><span style="color:#000000">= 1.86 x 10<sup>-5</sup></span></p>Solutionshttps://www.sarthaks.com/783288/0-6-ko-of-acetic-acid-having-density-1-06-g-ml-is-dissolved-in-1-litre-of-water?show=783479#a783479Thu, 28 May 2020 00:39:28 +0000Answered: 2 g of benzoic acid dissolved in 25 g of benzene shows a depression in freezing point equal to 1.62k .
https://www.sarthaks.com/783275/of-benzoic-acid-dissolved-in-25-of-benzene-shows-depression-in-freezing-point-equal-to-62k?show=783478#a783478
<p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=8470017215595934969" style="height:377px; width:290px"></span></p><p><span style="color:#000000">If x is the degree of association, (1−x) mole of benzoic acid left undissociated & corresponding x/2 as associated moles of C<sub>6</sub>H<sub>5</sub>COOH at equilibrium.<br><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=6018065959548013485" style="height:399px; width:356px"></span></p>Solutionshttps://www.sarthaks.com/783275/of-benzoic-acid-dissolved-in-25-of-benzene-shows-depression-in-freezing-point-equal-to-62k?show=783478#a783478Thu, 28 May 2020 00:29:29 +0000Answered: Let S be the set of all functions f : [0, 1] →R which are continuous on [0, 1] and differentiable on (0, 1).
https://www.sarthaks.com/577991/let-s-be-the-set-of-all-functions-f-0-1-r-which-are-continuous-on-0-1-and-differentiable-on-0-1?show=783289#a783289
<p><span style="color:#000000"><strong>The correct option is (3) |f(c) + f(1)| < (1 + c)| f'(c)|</strong></span></p><p><span style="color:#000000">Use LMVT theorem & check option.</span></p>Mathematicshttps://www.sarthaks.com/577991/let-s-be-the-set-of-all-functions-f-0-1-r-which-are-continuous-on-0-1-and-differentiable-on-0-1?show=783289#a783289Wed, 27 May 2020 16:10:52 +0000Answered: When ammonia is added to the solution, pH is raised to 1 1. Which half-cell reaction is affected by pH and by how much?
https://www.sarthaks.com/288663/when-ammonia-added-the-solution-is-raised-to-which-half-cell-reaction-affected-and-how-much?show=783154#a783154
<p><span style="color:#000000"><strong>Answer (c) E<sub>red</sub> will increase by a factor of 0.65 from E°<sub>red</sub> </strong></span></p><p><strong><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=4105936571381120177"></span></strong></p>Redox reactions and electrochemistryhttps://www.sarthaks.com/288663/when-ammonia-added-the-solution-is-raised-to-which-half-cell-reaction-affected-and-how-much?show=783154#a783154Wed, 27 May 2020 14:18:24 +0000Answered: Topic:electro chemistry
https://www.sarthaks.com/781166/topic-electro-chemistry?show=781278#a781278
<p><span style="color:#000000"><strong>Answer: E<sub>red</sub> will increase by a factor of 0.65 from E°<sub>red</sub></strong></span></p><p><span style="color:#000000">On increasing concentration of NH<sub>3</sub>, the concentration of H<sup>+</sup> ion decreases, therefore,</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=4177574052554264922" style="height:94px; width:233px"></span></p>Redox reactions and electrochemistryhttps://www.sarthaks.com/781166/topic-electro-chemistry?show=781278#a781278Tue, 26 May 2020 12:16:17 +0000Answered: Compare the stability of following carbanion?
https://www.sarthaks.com/780753/compare-the-stability-of-following-carbanion?show=780837#a780837
<p><span style="color:#000000"><strong>The correct stability of carbanion is as follow: </strong></span></p><p><span style="color:#000000"><strong>(3) > (1) > (2) > (4) </strong></span></p>Chemistryhttps://www.sarthaks.com/780753/compare-the-stability-of-following-carbanion?show=780837#a780837Tue, 26 May 2020 08:56:01 +0000Uranium-238ionsaccelerated through a potential difference of 2 kV 1.2 Tesla
https://www.sarthaks.com/779815/uranium-238ionsaccelerated-through-a-potential-difference-of-2-kv-1-2-tesla
Uranium-238 ions accelerated through a potential difference of 2 kV and enter a uniform magnetic field of magnitude 1.2Tesla directed perpendicular to their velocities. What is the radius of the circular path of the ions?Electromagnetic induction and alternating currentshttps://www.sarthaks.com/779815/uranium-238ionsaccelerated-through-a-potential-difference-of-2-kv-1-2-teslaMon, 25 May 2020 11:32:22 +0000Elementary Operations
https://www.sarthaks.com/779700/elementary-operations
<p>By using elementary operations, find the inverse of a matrix, provided that the inverse exists.</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=10099928285798912785" style="height:259px; width:600px"></p><p></p>Matrices & determinantshttps://www.sarthaks.com/779700/elementary-operationsMon, 25 May 2020 09:33:52 +0000Answered: How to solve these kinds of problems
https://www.sarthaks.com/778574/how-to-solve-these-kinds-of-problems?show=779511#a779511
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=9035028543138323516" style="height:508px; width:600px">......,.......</p>JEEhttps://www.sarthaks.com/778574/how-to-solve-these-kinds-of-problems?show=779511#a779511Mon, 25 May 2020 07:09:44 +0000Arrange the following compound in decreasing order of acidity:
https://www.sarthaks.com/779404/arrange-the-following-compound-in-decreasing-order-of-acidity
<p>Arrange the following compound in decreasing order of acidity:</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=9063485688393279156" style="height:176px; width:600px"></p>Some basic principles of organic chemistryhttps://www.sarthaks.com/779404/arrange-the-following-compound-in-decreasing-order-of-acidityMon, 25 May 2020 04:39:20 +0000Answered: What is the formula and pkease tell me the concept
https://www.sarthaks.com/778552/what-is-the-formula-and-pkease-tell-me-the-concept?show=779403#a779403
<p><strong><span style="color:#000000">Answer: 2.5 kΩ</span></strong></p><p><span style="color:#000000">We have β= 80, V<sub>BE</sub>= 0.7 volt</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=11460628240211111116" style="height:979px; width:600px"></span></p>JEEhttps://www.sarthaks.com/778552/what-is-the-formula-and-pkease-tell-me-the-concept?show=779403#a779403Mon, 25 May 2020 03:39:40 +0000Since gravitational field is conservative, we can conserve the total mechanical energy of the system of interacting particles.
https://www.sarthaks.com/779394/gravitational-conservative-conserve-mechanical-energy-system-interacting-particles
<p><span style="color:#000000">Since gravitational field is conservative, we can conserve the total mechanical energy of the system of interacting particles. As the net force acting on a closed system is zero, we can conserve the linear momentum of the system.<img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=18014294827864729269" style="height:300px; width:600px"></span></p>Gravitationhttps://www.sarthaks.com/779394/gravitational-conservative-conserve-mechanical-energy-system-interacting-particlesSun, 24 May 2020 19:27:40 +0000Answered: water is polar, because of
https://www.sarthaks.com/778139/water-is-polar-because-of?show=778171#a778171
<p><span style="color:#000000">Water (H<sub>2</sub>O) is a polar molecule because the electrons of the hydrogen atoms get "pulled" towards the electrons of the oxygen atom. This makes a region of positive charge on the hydrogen atoms and the negative charge on the other end of the molecule, which is the oxygen atom.</span></p>Chemical bonding and molecular structurehttps://www.sarthaks.com/778139/water-is-polar-because-of?show=778171#a778171Sat, 23 May 2020 14:51:23 +0000Answered: For an A.P. T10 = 1/20; T20 = 1/10 Find sum of first 200 term. (1) 201(1/2) (2) 101(1/2)
https://www.sarthaks.com/569687/for-an-a-p-t10-1-20-t20-1-10-find-sum-of-first-200-term-1-201-1-2-2-101-1-2?show=777854#a777854
<p>The answer is 201/2</p><p>We know that if T<sub>p</sub>=1/q and T<sub>q</sub>=1/p then T<sub>pq</sub>=(pq+1)/2</p><p>It was given in jee mains 2020</p>Mathematicshttps://www.sarthaks.com/569687/for-an-a-p-t10-1-20-t20-1-10-find-sum-of-first-200-term-1-201-1-2-2-101-1-2?show=777854#a777854Sat, 23 May 2020 12:21:05 +0000Answered: Question based on electric flux jee advance 2018
https://www.sarthaks.com/777361/question-based-on-electric-flux-jee-advance-2018?show=777631#a777631
<p><span style="color:#000000">Consider the diagram.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=2047432347272800586" style="height:280px; width:199px"></span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=7039759976866957837" style="height:155px; width:301px"></span></p><p><span style="color:#000000">The charge enclosed by the portion of wire PQ is given by,</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=2662667404797667344" style="height:88px; width:144px"></span></p><p><span style="color:#000000">Apply Gauss law,</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=15335008986532761227" style="height:144px; width:110px"></span></p><p><span style="color:#000000">This flux points radially outward from the wire so that the electric field in the direction of z-component is zero and also it is normal to the wire, not to the spherical shell.</span></p>Electrostaticshttps://www.sarthaks.com/777361/question-based-on-electric-flux-jee-advance-2018?show=777631#a777631Sat, 23 May 2020 11:27:48 +0000Uniform rod of mass m and length l is at rest on smooth horizontal surface.
https://www.sarthaks.com/777407/uniform-rod-of-mass-m-and-length-l-is-at-rest-on-smooth-horizontal-surface
A uniform rod of mass m and length l is at rest on smooth horizontal surface. An impulse p is applied to end B . The point about which the rod can be assumed to be rotating just after the impulse applied is.JEEhttps://www.sarthaks.com/777407/uniform-rod-of-mass-m-and-length-l-is-at-rest-on-smooth-horizontal-surfaceSat, 23 May 2020 10:36:39 +0000Image of the object can be
https://www.sarthaks.com/773226/image-of-the-object-can-be
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=3119761050671391770" style="height:281px; width:600px"></p>Opticshttps://www.sarthaks.com/773226/image-of-the-object-can-beThu, 21 May 2020 16:20:30 +0000The optical rotation of sucrose containing solution in presence of dil. HCl at various intervals is given below:
https://www.sarthaks.com/771226/the-optical-rotation-sucrose-containing-solution-presence-various-intervals-given-below
<p><span style="color:#000000">The optical rotation of sucrose containing solution in presence of dil. HCl at various intervals is given below:</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=13011850603614843811" style="height:184px; width:600px">pls help with solution</span></p><p><span style="color:#000000">Answer is 2</span></p>Chemical kineticshttps://www.sarthaks.com/771226/the-optical-rotation-sucrose-containing-solution-presence-various-intervals-given-belowWed, 20 May 2020 16:14:50 +0000The reaction(CH3)3COOC(CH3)3(g) → 2CH3COOCH3(g)+C2H6(g) is carried out at constant volume with P0
https://www.sarthaks.com/771211/the-reaction-ch3-3cooc-ch3-3-g-2ch3cooch3-g-c2h6-g-is-carried-out-at-constant-volume-with-p0
<p><span style="color:#000000">The reaction(CH<sub>3</sub>)<sub>3</sub>COOC(CH<sub>3</sub>)<sub>3</sub>(g) → 2CH<sub>3</sub>COOCH<sub>3</sub>(g)+C<sub>2</sub>H<sub>6</sub>(g) is carried out at constant volume with P<sub>0</sub> as the pressure of (CH<sub>3</sub>)<sub>3</sub>COOC(CH<sub>3</sub>)<sub>3</sub> initially and total pressure at any time is P.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=8478358511606273716" style="height:204px; width:600px">pls help with the solution</span></p><p><span style="color:#000000">Answer is 1</span></p>Chemical kineticshttps://www.sarthaks.com/771211/the-reaction-ch3-3cooc-ch3-3-g-2ch3cooch3-g-c2h6-g-is-carried-out-at-constant-volume-with-p0Wed, 20 May 2020 15:56:53 +0000Answered: Chemical kinetics
https://www.sarthaks.com/770884/chemical-kinetics?show=770964#a770964
<p><span style="color:#000000">For a zero order reaction we have the following condition:</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=14494542769906431865" style="height:564px; width:318px"></span></p><p><span style="color:#000000">This is the half-life equation for a zero order reaction. We can now solve the problem. We must solve for k.</span></p><p><span style="color:#000000">10 min = 1M/2k </span></p><p><span style="color:#000000">k = 0.05</span></p><p><span style="color:#000000">Therefore, if the concentration is 2 M, the half-life would be:</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=6650384766442717356" style="height:40px; width:179px"></span></p>Chemical kineticshttps://www.sarthaks.com/770884/chemical-kinetics?show=770964#a770964Wed, 20 May 2020 14:42:21 +0000Answered: Equilibrium of third charge
https://www.sarthaks.com/767380/equilibrium-of-third-charge?show=769763#a769763
<p><span style="color:#000000"><strong>b)The third charge is in stable equilibrium</strong></span></p><p><span style="color:#000000">The repulsive forces on the 3rd charge due to 1<sup>st </sup>and the 2<sup>nd </sup>charges are equal in magnitude and are directed in the opposite direction to each other. Hence, the effect of these forces on the 3rd charge cancels out and it remains in stable equilibrium.</span></p>Electrostaticshttps://www.sarthaks.com/767380/equilibrium-of-third-charge?show=769763#a769763Wed, 20 May 2020 08:48:12 +0000Answered: In the given structure at how many atoms the positive charge will be delocalised through resonance
https://www.sarthaks.com/768258/the-given-structure-how-many-atoms-the-positive-charge-will-delocalised-through-resonance?show=768941#a768941
5 places....Organic compounds containing halogenshttps://www.sarthaks.com/768258/the-given-structure-how-many-atoms-the-positive-charge-will-delocalised-through-resonance?show=768941#a768941Wed, 20 May 2020 04:56:35 +0000