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CBSE

Subject

Chemistry

NEET Chemistry : Equilibrium

Multiple Choice Questions

111.

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

112.

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

113.

K_a for HCN is 5 x 10^-10at 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

114.

The temperature dependence of a reaction is represented by the Arrhenius equation:

ln k = - $\frac{E_{a}}{RT} + \ln A$

Which among the following is wrong conclusion about the given plot?

Intercept of the line= ln A
Slope = - $\frac{E_{a}}{RT}$
Reaction with high activation energy is more temperature sensitive than that of low activation energy (E_a).
Slope = - $\frac{E_{a}}{R}$

115.

K_P for the reaction A $⇌$ B is 4. If initially only A is present then what will be the partial pressure of B after equilibrium?

116.

Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?

H₄P₂O₅
HPO₃
H₃PO₃
H₃PO₂

117.

Calculate the overall complex dissociation equilibrium constant for the [Cu(NH₃)₄]²⁺ ions, given that stability constant ( $β_{4}$ ) for this complex is 2.1 $\times$ 10¹³.