Hydrogen is responsible for producing

1. heat and light
2. hydrogenated oil
3. fertilizers
4. all of the above

Hydrogen is

1. combustible
2. non-combustible
3. supporter of combustion
4. neither supporter nor combustible

Assertion (A): On the earth, hydrogen is mostly found in the form of compounds.

Reason (R): Hydrogen is a highly reactive element.

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.

Assertion (A): In the laboratory preparation of hydrogen, granulated zinc is reacted with dilute acid.

Reason (R): Granulated zinc contains copper as an impurity.

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.