Physical Properties (Group 1)

Q.

Metals are the chemical elements that have the capacity to lose ______ and form _______ ions called cations.

Q. Crude common salt becomes damp when kept open in air because:

1. $NaCl$ is hygroscopic in nature
2. It contains $MgC{l}_2$ and $CaC{l}_2$ as impurities which are deliquescent in nature
3. (a) and (b) both
4. None

Q. Crude common salt becomes damp when kept open in air because:

1. $NaCl$ is hygroscopic in nature
2. It contains $MgC{l}_2$ and $CaC{l}_2$ as impurities which are deliquescent in nature
3. (a) and (b) both
4. None

Q. Highly pure dilute solution of sodium in liquid ammonia
(IIT-JEE, 1998)

1. Shows blue colour
2. Exhibits electrical conductivity
3. Produces sodium anide
4. Produces hydrogen gas

Q.

The correct order of density of alkali metals is:

1. 

2. 

3. 

4. 

Q. The metallic lustre of sodium is explained by the presence of:

1. $N{a}^{+}$ ions
2. The oscillation of loosely bound electrons
3. Inert gas configuration
4. BCC lattice