Which of the following figures correctly describes electrorefining ?

1.

2.

3.

4.

Assertion (A): The RMM of a gas is 64, then its vapour density is 32.

Reason (R): RMM is twice the vapour density.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

The organic compound prepared when acetylene reacts with excess of hydrogen:

1. Ethane
2. Ethene
3. Methane
4. Propane

The IUPAC name of acetaldehyde is:

1. Ethanoic acid
2. Methanal
3. Ethanal
4. Ethanol