The following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations :

A)  $60$ $mL$ $\frac{M}{10}HCI$ $$ $+$ $40$ $mL$ $\frac{M}{10}NaOH$
B)   $55$ $mL$ $\frac{M}{10}HCI$ $$ $+$ $45$ $mL$ $\frac{M}{10}NaOH$
C)  $75$ $mL$ $\frac{M}{5}HCI$ $$ $+$ $25$ $mL$ $\frac{M}{5}NaOH$
D)  $100$ $mL$ $\frac{M}{10}HCI$ $$ $+$ $100$ $mL$ $\frac{M}{10}NaOH$

pH of which one of them will be equal to 1?

1. B
2. A
3. D
4. C

The solubility of BaSO₄ in water is $2.42$ $\times$ ${10}^{-3}$ g/ litre at 298 K. The value of the solubility product will be: (Molar mass of BaSO₄ = 233 gmol^–1)

Mark the conditions that favour the maximum product formation in the given reaction.
 $A_2$ $\left(g\right)$ $$ $+$ $B_2$ $\left(g\right)$ $$ $\leftrightharpoons$ $X_2$ $(g),$ ${∆}_{r}H$ $=$ $-X$ $k$ $J$ $$ 

1. Low temperature and High pressure
2. Low temperature and Low pressure
3. High temperature and High pressure
4. High temperature and Low pressure

The concentration of the Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.2 x 10^-4 M. The solubility product of Ag₂C₂O₄ is

1. 2.42 x 10^-8

2. 2.66 x 10^-12

3. 4.5 x 10^-11

4. 5.3 x 10^-12

The equilibrium of three reactions with their respective equilibrium constants are given below,

\( \begin{array}{lc} \mathrm{N}_2+3 \mathrm{H}_2 \rightleftharpoons 2 \mathrm{NH}_3 & \mathrm{~K}_1 \\ \mathrm{~N}_2+\mathrm{O}_2 \rightleftharpoons 2 \mathrm{NO} & \mathrm{K}_2 \\ \mathrm{H}_2+\frac{1}{2} \mathrm{O}_2 \rightleftharpoons \mathrm{H}_2 \mathrm{O} & \mathrm{K}_3 \end{array} \)

The equilibrium constant (K) of the following reaction will be : 
$2{\mathrm{NH}}_3+\frac{5}{2}{\mathrm{O}}_2$ $\stackrel{\mathrm{K}}{\rightleftarrows }$ $2\mathrm{NO}+3{\mathrm{H}}_2\mathrm{O}$

1. \( \frac{K_{2}K_{3}^{3}}{K_{1}}\)
2. \( \frac{K_{2}K_{3}}{K_{1}}\)
3. \( \frac{K_{2}^{3}K_{3}}{K_{1}}\)
4. \( \frac{K_{3}^{3}K_{1}}{K_{2}}\)

The concentration of Ag⁺ ions in a saturated solution of Ag₂C₂O₄ is 2.2 × 10^–4 mol L^–1.
The solubility product of Ag₂C₂O₄ is:

A 20-litre container at 400 K contains CO₂ (g) at pressure 0.4 atm and an excess of SrO (neglecting the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container.
The maximum volume of the container, when the pressure of CO₂ attains its maximum value will be:
(Given that: SrCO₃(s) ⇋ SrO(s) + CO₂(g) , Kp = 1.6 atm) 

The solubility of AgCl (s) with solubility product 1.6 x 10^-10 in 0.1 M NaCl solution would be

(1) 1.26 x 10^-5 M               

(2) 1.6 x 10^-9 M

(3) 1.6 x 10^-11 M               

(4) zero

Which of the following fluoro-compounds is most likely to behave as a Lewis base?
(1) BF₃

(2) PF₃

(3) CF₄

(4) SiF₄

The percentage of pyridine (C₅H₅N) that forms pyridinium ion (C₅H₅N⁺H) In A 0.10 M aqueous pyridine solution (K_b for C₅H₅N = 1.7 × 10^–9) is?

1. 0.0060%

2. 0.013%

3. 0.77%

4. 1.6%