The density of water is \(1000~\text{kg/m}^{3}\). The density of water vapour at \(100^{\circ}\text{C}\) and \(1\) atm pressure is \(0.6~\text{kg/m}^{3}\). The volume of a molecule multiplied by the total number gives, what is called, molecular volume. The ratio (or fraction) of the molecular volume to the total volume occupied by the water vapour under the above conditions of temperature and pressure is:
1. \(5\times 10^{-4}\)
2. \(60\times 10^{-4}\)
3. \(50\times 10^{-4}\)
4. \(6\times 10^{-4}\)
The density of water is 1000 kg m–3. The volume of a water molecule is:
1.
2.
3.
4.
The density of water is 1000 kg m–3. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg m–3. What is the average distance between molecules (intermolecular distance) in water? (Given, the diameter of a water molecule in liquid state = 4 )
1.
2.
3.
4.
A vessel contains two nonreactive gases: neon (monatomic) and oxygen (diatomic). The ratio of their partial pressures is \(3:2.\) The ratio of the number of molecules is:
(Atomic mass of Ne \(=20.2\) u, molecular mass of O2 \(=32.0\) u)
1. \(2:3\)
2. \(3:2\)
3. \(1:3\)
4. \(3:1\)
A vessel contains two nonreactive gases: neon (monatomic) and oxygen (diatomic). The ratio of their partial pressures is 3:2. The ratio of mass density of neon and oxygen in the vessel is: (Atomic mass of Ne = 20.2 u, molecular mass of O2 = 32.0 u).
1. 0.397
2. 0.937
3. 0.947
4. 1
When a molecule (or an elastic ball) hits a ( massive) wall, it rebounds with the same speed. When a ball hits a massive bat held firmly, the same thing happens. However, when the bat is moving towards the ball, the ball rebounds at a different speed. Does the ball move faster or slower?
1. faster
2. slower
3. The speed of the ball does not change
4. none of these