CBSE
Multiple Choice QuestionsThe temperature dependence of a reaction is represented by the Arrhenius equation:
ln k = -
Which among the following is wrong conclusion about the given plot?
Intercept of the line= ln A
Slope = -
Reaction with high activation energy is more temperature sensitive than that of low activation energy (Ea).
Slope = -
KP for the reaction A B is 4. If initially only A is present then what will be the partial pressure of B after equilibrium?
1.2
0.8
0.6
1
Assertion : The second dissociation constant of fumaric acid is greater than maleic acid.
Reason : Higher the dissociation constant of acid, more is the acidic character.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false
Ka for HCN is 5 x 10-10 at 25°C. For maintaining a constant pH = 9, the volume of 5 M KCN solution required to be added to 10 mL of 2 M HCN solution is
4 mL
2.5 mL
2 mL
6.4 mL
Which of the following compounds is the weakest Bronsted base ?
NO2 (brown colour gas) exists in equilibrium with N2O4 (colourless gas) as given by chemical equation.
Mixture is slightly brown due to existence of NO2. If pressure is increased :
colour intensity is increased
colour intensity is decreased
colour intensity first increases and then decreases
No change in colour intensity
If the equilibrium constant of the reaction of weak acid HA with strong base is 109 then pH of 0.l M NaA is :
5
9
7
8
Calculate the overall complex dissociation equilibrium constant for the [Cu(NH3)4]2+ ions, given that stability constant () for this complex is 2.1 1013.
8.27 10-13
4.76 10-14
2.39 10-7
1.83 1014
0.1 M solution of CH3COOH should be diluted to how many times so that pH is doubled ?
4.0 times
5.55 x 104 times
5.55 x 106 times
10-2 times
Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?
H4P2O5
HPO3
H3PO3
H3PO2
