The reaction among the following that proceeds through an electrophilic substitution reaction is:

1.
2.
3.
4.

The structure of intermediate A in the following reaction is:

1.		2.
3.		4.

What is the correct electronic configuration of the central metal ion in \(\mathrm{K_{4}Fe(CN)_{6}}\) based on crystal field theory:

Among the following, the one that is not a greenhouse gas is:

1. Sulphur dioxide

2. Nitrous oxide

3. Methane

4. Ozone

False statement regarding PCl₅ is:

Which one is a malachite from the following?

1. CuCO₃.Cu(OH)₂

2. CuFeS₂

3. Cu(OH)₂

4. Fe₃O₄

Which of the following species is not stable?

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75 % of octahedral voids. The formula of the compound is:

1. ${\mathrm{C}}_3{\mathrm{A}}_4$

2. ${\mathrm{C}}_2{\mathrm{A}}_3$

3. ${\mathrm{C}}_3{\mathrm{A}}_2$

4. ${\mathrm{C}}_4{\mathrm{A}}_3$

The correct structure of tribromo octoxide is:

1.
2.
3.
4.

The method used to remove the temporary hardness of water is-

1. Synthetic resins method

2. Calgon's method

3. Clark's method

4. Ion-exchange method