Preparation and Properties of Beryllium Hydride

Q. Berryllium chloride can be prepared by passing chlorine vapours over heated mixture of

1. and
2. and
3. and
4. 

Q.

A lab technician was told to prepare ammonia in his lab. What reactants should he use?

1. $Ca(OH{)}_2$ and $N{H}_{4}Cl$

2. $Ca$ and $N{H}_{4}Cl$

3. $Ca$ and $N{H}_{4}OH$

4. $Na$ and $N{H}_{4}Cl$

Q. Which among the given compounds are used to produce ammonia in a laboratory?

1. $Ca(OH{)}_2$ (Calcium hydroxide) and $N{H}_{4}Cl$ (Ammonium chloride)
2. $Ca$ (Calcium) and $N{H}_{4}Cl$ (Ammonium chloride)
3. $Ca(OH{)}_2$ (Calcium hydroxide) and $N{H}_{4}OH$ (Ammonium hydroxide)
4. $Na$ (Sodium) and $N{H}_{4}Cl$ (Ammonium chloride)

Q. Radium is a radioactive substance. It dissolves in dilute $H_{2}S{O}_4$ and forms a compound radium sulfate. The compound is:

1. no longer radioactive
2. half as radioactive as the radium content
3. as radioactive as the radium content
4. twice as radioactive as the radium content

Q. Radium is a radioactive substance. It dissolves in dilute $H_{2}S{O}_4$ and forms compound radium sulphate. What is the compound ?

1. No longer radioactive
2. Half as radioactive as radium content
3. As radioactive as the radium content.
4. Twice as radioactive as the radium content