JEE 2010 Paper 1 , Chem. Multiple Choice , Buffer Soln !

No, but what if they are equal in volume .They would react completely and no buffer action then. Even if Volume of HNO3 is more then also there would be no buffer action. So how can we assume HNO3 is limiting ? Look at these three cases -

REMEMBER - Concentration is Identical not the volume that we have mixed, so amount of HNO3 and CH3COONa can be varied.

CASE 1 -
HNO₃ is Limiting .
In this case we will have buffer action . There will be some amount of acetic acid and sod. acetate present in the soln.

CASE 2 -
Volume of HNO₃ and CH₃COONa is equal.
In this case they would react completely and hence no sod. acetate hence no buffer action.

CASE 3 -
HNO₃ is in Excess.
In this case HNO₃ and Acetic Acid will be present in the solution. Hence there is no buffer action.

Even if one the possible cases is found to be wrong ,Generally the option is assumed to be wrong .

i feel only D

bufeer is weak acid with salt of a strong base ????

HNO3 is not weak right???

n aqquoes solution means the the HNO3 would totally disintegrate ??

Definitely HNO3 isn't weak but it can produce a weak acid on reaction with sodium acetate i.e Acetic Acid !

its weak acid and salt of weak acid and a strong base !!!!