Question

Which of the following will produce a buffer sollution when mixed in equal volumes ?
A. `Co(g)` and `O_(2)(g)` taken in molar ratio 2:1
B. 10 ml of `CH_(4)(g)` and `30ml` of `O_(2)(g)`
C. `N_(2)(g)` and `H_(2)(g)` taken in a molar ratio 3:1
D. `CH_(4)(g)` and `O_(2)(g)` taken in a molar ratio 1:6

Answer 1

Correct Answer - A::B
(A) `{:(CO(g)+,(1)/(2)O_(2)(g)rarr,CO_(2)(g)),(2,1,),(0,0,2):}`
% change in mole `=(1)/(3) xx 100`
(B) `{:(CH_(4)(g)+,2O_(2)(g)rarrCO_(2)(g)+2H_(2)(l)),(10ml,30ml):}`
Volume contraction =20ml
% change in volume `=(20)/(40) xx 100`
(C) `{:(N_(2)(g)+,3H_(2)(g)rarr,2NH_(3)(g)),(3mol,,1mol),([3=(1)/(4)]mol,L.R,2//3mol):}`
% change `=((2)/(3))/(4) xx 100`
(D) `{:(CH_(4)(g)+,2O_(2)(g)rarr,CO_(2)(g)+2H_(2)O(l)),(1mol,6mol,),(L.R,4mol,1mol):}`
% change in mol `=(2)/(7) xx 100`