The ratio of \({{K_{P}}\over{K_{C}}}\) for the reaction

$\mathrm{CO}\left(\mathrm{g}\right)+\frac{1}{2}{\mathrm{O}}_2\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{CO}}_2\left(\mathrm{g}\right)$ $\mathrm{is:}$

1.	(RT)1/2	2.	(RT)-1/2
3.	RT	4.	1

The pair that represents a buffer solution among the following pairs is?

1. ${\mathrm{HNO}}_3$ and ${\mathrm{NH}}_4{\mathrm{NO}}_3$

2. $\mathrm{HCl}$ and $\mathrm{KCl}$

3. ${\mathrm{HNO}}_2$ and ${\mathrm{NaNO}}_2$

4. $\mathrm{NaOH}$ and $\mathrm{NaCl}$

Find the mixture that can act as a buffer solution.

Find the pair of solutions that can be mixed to prepare an acidic buffer.

1. Sodium chloride and sodium hydroxide

2. Sulphuric acid and sodium sulphate

3. Ammonium chloride and ammonium nitrate

4. Ammonium acetate and acetic acid

Which of the following combinations can be used to prepare a buffer solution?

I. Sodium acetate and acetic acid in water

II. Sodium acetate and hydrochloric acid in water

III. Ammonia and ammonium chloride in water

IV. Ammonia and sodium hydroxide in water.

1. I, III, IV

2. III, IV

3. I, II, IV

4. I,  III

The basic buffer solution among the following is: 

1. ${\mathrm{NH}}_4\mathrm{Cl}+{\mathrm{NH}}_4\mathrm{OH}$

2. $\mathrm{NaCl}+\mathrm{NaOH}$

3. ${\mathrm{NH}}_4\mathrm{Cl}+{\mathrm{CH}}_3\mathrm{COOH}$

4. ${\mathrm{CH}}_3\mathrm{COONa}+{\mathrm{CH}}_3\mathrm{COOH}$

Conjugate base of hydrazoic acid is: 

1. \({HN_3}^-\)${}_{}^{}$

2. \(N_2^-\)   ${\mathrm{}}_{}^{}$

3. \(N_3^-\) 
4. \({N^3}^-\)

Find the correct increasing order of pH for 0.1 M solutions of HCl, NH₄Cl, NaCl, and NaCN.

1. NaCl < NH₄Cl < NaCN < HCl
2. HCl < NH₄Cl < NaCl < NaCN
3. NaCN < NH₄Cl < NaCl < HCl
4. HCl < NaCl < NaCN < NH₄Cl

The pK_a of HCN is 9.30. The pH of a solution prepared by mixing 2.5 moles of KCN and 2.5 moles of HCN in water and making up the total volume to 500 ml will be:

Which of the following is an example of a reversible reaction?