If the molar concentration of ${\mathrm{SnCl}}_4$ is $1.5$ $\times$ ${10}^{-3}$ mol L^–1, the concentration of chloride ions will be:

1.	3.0 x 10-3	2.	6.0 x 10-3
3.	0.3 x 10-3	4.	0.6 x 10-6

The percentage degree of hydrolysis of a salt of weak acid (HA) and weak base (BOH) in its 0.1 M solution is found to be 10%. If the molarity of the solution is 0.05 M, the percentage hydrolysis of the salt should be -

1. 5 %

2. 10 %

3. 20 %

4. None of the above

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acids decreases in the sequence:

1. $BC{l}_3>B{F}_3>BB{r}_3$

2. $BB{r}_3>BC{l}_3>B{F}_3$

3. $BB{r}_3>B{F}_3>BC{l}_3$

4. $B{F}_3>BC{l}_3>BB{r}_3$

The concentration of $\left[{\mathrm{H}}^{+}\right]$ ion in a solution containing 0.1 M HCN and 0.2 M NaCN will be:

(${\mathrm{K}}_{\mathrm{a}}$ for HCN = $6.2\times {10}^{-10}$)

1. 3.1$\times {10}^{10}$

2. $6.2\times {10}^5$

3.$$ $6.2\times {10}^{-10}$

4. $3.1\times {10}^{-10}$

Assertion: $H^{-}$ acts as both Bronsted Lowry base as well as Lewis base.

Reason: It acts as both $H^{\oplus }$ acceptor and a lone pair donor.

1. Both assertion & reason are true and the reason is the correct explanation of the assertion.

2. Both assertion & reason are true but the reason is not the correct explanation of the assertion.

3. Assertion is a true statement but the reason is false.

4. Both assertion and reason are false statements.

Assertion: At equilibrium, ${\mathrm{K}}_{}={\mathrm{Q}}_{\mathrm{c}}.$

Reason: When ${\mathrm{K}}_{\mathrm{c }}> {\mathrm{Q}}_{\mathrm{c}},$ the reaction mainly goes in the forward direction.

Assertion: The equilibrium constant of a reaction changes by changing the stoichiometric coefficients of the reaction.

Reason: The reaction, $2N{O}_2\left(g\right)\underset{}{\rightleftharpoons }{N}_2{O}_4\left(g\right)$

and $N{O}_2\left(g\right)\underset{}{\rightleftharpoons }\frac{1}{2}{N}_2{O}_4\left(g\right)$ have the same equilibrium constant.

1. Both assertion & reason are true and the reason is the correct explanation of the assertion.

2. Both assertion & reason are true but the reason is not the correct explanation of the assertion.

3. Assertion is a true statement but the reason is false.

4. Both assertion and reason are false statements.