The heats of combustion of carbon monoxide at constant pressure and at constant volume at 27°C will differ from one another by :
27 cal
54 cal
300 cal
600 cal
A buffer solution is prepared by mixing 0.1 M ammonia and 1.0 M ammonium chloride. At 298 K, the pKb of NH4OH is 5.0. The pH of the buffer is
10.0
9.0
6.0
8.0
The standard emf of a cell, involving one electron change is found to be 0.591 V at 25°C. The equilibrium constant of the reaction is (F = 96500 C mol-1)
1.0 × 101
1.0 × 105
1.0 × 1010
1.0 × 1030
Which of the following is not a buffer ?
NH3 + HCl
CH3COOH + NaOH
HCOOH + HCOOK
NaOH + NaNO3
D.
NaOH + NaNO3
Buffer is a mixture of weak acid/ base and its conjugate base/acid. Thus, NaOH + NaNO3 is not a buffer among the given options.