For the given reaction, the degree of dissociation of B was found to be 20% at 300 K and 24% at 500K.
\(2 \mathrm{~A}(\mathrm{~s})+\mathrm{B}(\mathrm{g}) \rightleftharpoons \mathrm{C}(\mathrm{g})+2 \mathrm{D}(\mathrm{s})+\mathrm{E}(\mathrm{s})\)

The rate of backward reaction:

1.	Increases with increase in pressure and temperature
2.	Increases with increase in pressure and decrease in temperature
3.	Depends on temperature only and decreases with increase in temperature
4.	Increases with increase in concentration of B and increase in the temperature

The pH of 0.1 M solution of anilium chloride is (K_a of ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_3^{+}$ = 10^-6)

(1) 3.5

(2) 3

(3) 4.5

(4) none of these

1L of an aqueous solution contains 0.15mole of CH₃COOH (pKa = 4.8) and 0.15 mole of CH₃COONa. After the addition of 0.05 mole of solid NaOH to this solution, the pH will be

(1) 4.5

(2) 4.8

(3) 5.1

(4) 5.4

In the following reaction

${\mathrm{HC}}_2{\mathrm{O}}_4^{-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{PO}}_4^{3-}<mspace\; width="1em"></mspace>\rightleftharpoons {\mathrm{HPO}}_4^{2-}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$ 

Which are the two Bronsted bases ?

1. ${\mathrm{H}}_2{\mathrm{C}}_2{\mathrm{O}}_4^{-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{PO}}_4^{3-}$

2. ${\mathrm{HPO}}_4^{2-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

3. ${\mathrm{H}}_2{\mathrm{C}}_2{\mathrm{O}}_4^{-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{HPO}}_4^{-2}$

4. ${\mathrm{PO}}_4^{3-}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

Percentage ionisation of water at certain temperature is 3.6 X 10^-7%, Calculate K_w and pH of water.

1. 10^-14, pH = 6.7

2. 4 X 10^-14, pH=6.7

3. 2X 10^-14, pH=7

4. 10^-14, pH=7

A 50 ml solution of strong acid of pH = 1 is mixed with a 50 ml solution of strong acid of pH=2. The pH of the mixture will be nearly:                                                     

(log 5.5 = 0.74)

1. 0.74                   

2. 1.26

3. 3.76                 

4. 4.50

1 litre solution of pH =4 (solution of a strong acid) is added to the 7/3 litre of water. What is the pH of resulting solution. (Log 3 = 0.48)

1. 4

2. 4.48

3. 4.52

4. 5

The pH of a solution obtained by mixing 50ml of 0.4N HCl and 50ml of 0.2M NaOH is:

1. 13

2. 12

3. 1.0

4. 2.0

K_b for a monoacidic base whose 0.10 M solution has a pH of 10.48

1. 9 X 10^-6

2. 9 X 10^-9

3. 9 X 10^-7

4. 3 X 10^-7

In an acidic Buffer solution (CH₃COOH + CH₃COONa), the species mainly present in the solution are:

(Ignore negligible amount)

1. CH₃COOH, CH₃COO^-, CH₃COONa, H⁺

2. CH₃COO^-, Na⁺, CH₃COOH

3. CH₃COONa, CH₃COO-, H⁺

4. CH₃COO^-, Na⁺, H⁺, CH₃COONa