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- 1. Multiple Choice
In which of the following conditions the distance between 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.
(I), (III)
(I), (IV)
(II), (III)
(II), (IV)
- 2. Multiple Choice
When a gas jar full of air is placed upside down on a gas jar full of Bromine vapours, the vapours of bromine from the lower jar go to the upward jar. According to this experiment :
Air is heavier than bromine
Both have the same density
Bromine is heavier than air
Bromine can't be heavier than air because it is going against the gravity.
- 3. Multiple Choice
A form of matter has not a fixed shape, but has a fixed volume. One example of this type of matter is :
Krypton
Kerosene
Carbon dioxide
Carbon steel
- 4. Multiple Choice
Which of the following statements is not true ?
The molecules in a solid vibrate about a fixed position.
The molecules in a liquid are arranged in a regular pattern.
The molecules in a gas exert negligibly small forces on each other.
The molecules of a gas occupy all the space available.
- 5. Multiple Choice
When water at 0 degrees Celsius freezes form ice in the same temperature, then it :
Absorbs some heat
Releases some heat
Neither absorbs nor releases
Absorbs exactly 3.34 x 10^5 J/kg of heat
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