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Which one of the following are correctly arranged on the basis of the property indicated:

(a) I2 < Br2 < F2 < Cl2 [increasing bond dissociation enthalpy]

(b) H2O > H2S < H2Te < H2Se [increasing acidic strength]

(c) NH3 < N2O < NH2OH < N2O5 [increasing oxidation state]

(d) BiH3 < SbH3 < AsH3 < PH3 < NH[increasing bondangle]

2 Answers

+2 votes
by (30.5k points)
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Best answer

Answer is (d) BiH3 < SbH3 < AsH3 < PH3 < NH3 [ increasing bond angle]

(a) I2 < Br2 > F2 > CI2. [ increasing bond dissociation enthalpy]: incorrect order , correct order is Cl2 > Br2 > F2 > I2.

(b) H2O > H2S < H2Te < H2Se [ increasing acidic strength]: incorrect order , correct order is

H2O < H2S < H2Se < H2Te

(c) NH3 < N2O < NH2OH < N2O5 [ increasing oxidation state ] : incorrect order NH3 

(Oxidation state -3) N2O (Oxidation state +1) NH2OH(Oxidation state -1) N2O5 (Oxidation state +5)

+1 vote
by (15.2k points)

Correct answer is (d) BiH3<SbH3<AsH3<PH3 <NH3 [ increasing bond angle due to leaving ammonia other are 

drago molecules which donot show hybridization and thus from bond angle close to 90°]- correct order.

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