The incorrect statement about alkali metals is -

1. They have low density.

2. They have high ionization enthalpy.

3. They are highly reactive.

4. They show photoelectric effect.

Sodium is less reactive than potassium because-

1. Potassium loses electron easily.

2. Sodium loses electron easily.

3. Size of sodium is larger than potassium.

4. Nuclear charge is more on potassium.

Beryllium and Magnesium do not impart color in flame test, because -

1. Be and Mg have high Ionization Energy.

2. Be and Mg have low Ionization Energy.

3. Be and Mg radiate energy in the Infra-Red region.

4. Be and Mg have a high radius.

LiF is almost insoluble in water whereas LiCl is soluble in water and acetone both, because of:

Sodium hydroxide can be prepared by:

1. Down's Process.

2. Castner–Kellner process.

3. Solvay's Process.

4. None of the above.

The characteristic of alkaline earth metals is that-

1. Their general oxidation state is +1

2. They have a smaller size than alkali metals.

3. They are electronegative in nature.

4. They are strong oxidizing agents.

The incorrect equation for Solvay process is -

1. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2+2{\mathrm{NH}}_4\mathrm{Cl}\to {\mathrm{NH}}_3+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{CaCl}}_2$

2. $2{\mathrm{NaHCO}}_3\to {\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

3. $2\mathrm{NaCl}+{\mathrm{CaCO}}_3\to {\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{CaCl}}_2$

4. None of the above.

The incorrect statement among the following is-

Quick lime is heated with silica to give:

1. CaSiO₃

2. CaSiO₄

3. CaSiO

4. Ca(SiO)₃

Match the following: