Structure of the Atom — Science STD 9 — Question

The correct electronic configuration of a chloride ion is:

1. 2, 8
2. 2, 8, 4
3. 2, 8, 8
4. 2, 8, 7

Which of the following statement is true about mole:

The ratio of moles of atoms in 12g of magnesium and 16g of sulphur will be:

1. 3 : 4
2. 4 : 3
3. 1 : 1
4. 1 : 2

1 Nanometer is equal to:

The rate of evaporation does not depends on:

Subatomic particles that are neutral in charge:

On increasing the temperature, the rate of evaporation _________?

Pure copper sulphate can be obtained form an impure sample by the process of:

When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of:

1. Distribution.
2. Intrusion.
3. Diffusion.
4. Effusion.

Choose the correct statement of the following: