Question

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Answer 1

Explanation:

1. particles of gas move in all direction to fill the entire volume. A gas cylinder cannot be half filled because the particles of gas have less force of attraction and occupies the whole space given to them . ... This is why a gas cylinder cannot be half filled....
2. An iron rod is solid at room temperature because (i) It has definite shape and volume. (1/2) (ii) Its melting point is higher than the room temperature. (1/2) (iii) It has high density.

Answer 2

Sorry For late answer I got this time chance to answer

a) particles of gas move in all direction to fill the entire volume. A gas cylinder cannot be half filled because the particles of gas have less force of attraction and occupies the whole space given to them . ... This is why a gas cylinder cannot be half filled.

b) Answer: An iron rod is solid at room temperature because (i) It has definite shape and volume. (1/2) (ii) Its melting point is higher than the room temperature.