……………. is the functional group in methanol.

1. >C=O
2. –OH
3. –CHO
4. –COOH

The process of electrolysis is an example of:

1. Oxidation reaction
2. Reduction reaction
3. Redox reaction
4. Displacement reaction

An element belongs to third period and sixteenth group. It will have …………… electrons in its valence shell.

1. 2
2. 5
3. 6
4. 3

The setup shown below is that of the fountain experiment with hydrogen chloride gas in the flask.

The fountain starts when a few drops of water from the dropper are introduced into the flask. Instead of the drops of water, Pooja started the fountain by introducing a few drops of Sodium hydroxide into the flask.

(a) Explain why the litmus solution gets sucked up when Sodium hydroxide is used.

(b) What will be the colour of the fountain when Sodium hydroxide is used? Justify your answer.

(c) If instead of HCl gas, ammonia gas is filled in the flask and water is introduced from the dropper, will there be a different observation? Justify your answer.