MCQ-21
For third order reaction, the rate constant has units
A. mol dm-3s-1
B. mol-1dm³s-1
C. s-1
D. mol-2dm+6s-1 –
Answer: D
MCQ-22
Catalyst can change
A. Kc
B. Yield
C. AH
D. Ea
Answer: D
MCQ-23
The pH of buffer in which concentrations of salt and base are 0.1M and 0.01M respectively
(Pkb = 4.0)
A. 3.0
B. 9.0
C. 2.0
D. 11.0
Answer: B
MCQ-24
The equilibrium position is shifted backwards by increasing temperature in all except
A. N2(g) +3H2(g) ⇌ 2NH3(g)
B. N2 +O2 ⇌ 2NO –
C. 2SO2 + O2 ⇌ 2SO3
D. CO + H2O ⇌ CO2 + H2
Answer: B
MCQ-25
Ksp for the following can be written as
PbCl2 ⇌ Pb+2 + 2Cl-1
A. [Pb+2] [Cl–]2 –
B. [Pb+2] [2Cl–]2
C. [Pb+2] + [CI–]2
D. [Pb+2] [Cl–]
Answer: A
