Question

1. In which of the following conditions, the distance between the molecules of hydrogen gas
would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
(a) (i) and (iii) (b) (i) and (iv)
(c) (ii) and (iii) (d) (ii) and (iv)
2. Which one of the following statements is not true?
(a) The molecules in a solid vibrate about a fixed position
(b) The molecules in a liquid are arranged in a regular pattern
le) The molecules in a gas exert negligibly small forces on each other, except during collisions
(d) The molecules of a gas occupy all the space available
3. When water at 0°C freezes to form ice at the same temperature of 0°C, then it:
(a) Absorbs some heat
(b) Releases some heat
(c) Neither absorbs nor releases heat
(d) Absorbs exactly 3.34 x 105J/kg of heat​

Answer 1

Explanation:

1) (iii)

2) ( b)

3) (b)

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