An sp³-hybrid orbital contains:

1. $\frac{1}{4}$s-character

2. $\frac{1}{2}$s-character

3. $\frac{2}{3}$s-character

4. $\frac{3}{4}$s-character

Leaching is a process of:

1. reduction

2. concentration

3. refining

4. oxidation

Electrolysis of fused NaCl will give:

1. Na

2. NaOH

3. NaClO

4. $NaCl{O}_3$

Which of the following fluorides does not exist?

1. $N{F}_5$

2. $P{F}_5$

3. $As{F}_5$

4. $Sb{F}_5$

Red lead is:

1. PbO

2. $Pb{O}_3$

3. $P{b}_3{O}_4$

4. $P{b}_2{O}_3$

Hybridisation states of C in CH₃⁺ and CH₃^- are:

1. $s{p}^2,s{p}^3$

2. $s{p}^3,s{p}^2$

3. $sp,s{p}^2$

4. $s{p}^2,sp$

Which one of the following complexes is outer orbital complex?

1. $\left[Co\right(N{H}_3{)}_6{]}^{3+}$

2. $\left[Mn\right(CN{)}_6{]}^{4-}$

3. $\left[Fe\right(CN)6{]}^{4-}$

4. $\left[Ni\right(NH3{)}_6{]}^{2+}$

A solution made by dissolving 40 g NaOH in 1000 g of H₂O is:

1. 1 molar

2. 1 normal

3. 1 molal

4. None of these

0.1 mol HCl is equal to:

1. 3.65 g

2. 36.5 g

3. 18 g

4. 1.8 g

Which will liberate bromine from a solution of potassium bromide?

1. $l_2$

2. $C{l}_2$

3. $S{O}_2$

4. Hl