Reactivity with Air CO2 and Water (Group 1)

Q. Name the product formed when sodium react with water.

1. NaH
2. $N{a}_{2}O$
3. No reaction take place
4. NaOH

Q.

The reaction of sodium is highly exothermic with H₂O. The rate of reaction is lowered by

1. Lowering the temperature

2. Mixing with alcohol

3. Mixing with acetic acid

4. Making an amalgam

Q.

Cs⁺ ions impart violet colour to Bunsen flame. This is due to the fact that the emitted radiations are of

1. High energy

2. Lower frequencies

3. Longer wavelength

4. Zero wave number

Q. A metal on combustion in air vigorously forms a superoxide X . Name the metal.

1. Li
2. Na
3. None of the above
4. Rb

Q. Name the product formed when sodium react with water.

1. NaH
2. No reaction take place
3. $N{a}_{2}O$
4. NaOH

Q.

Cs⁺ ions impart violet colour to Bunsen flame. This is due to the fact that the emitted radiations are of

1. High energy

2. Lower frequencies

3. Longer wavelength

4. Zero wave number