Structure of the Atom — Science STD 9 — Question

All matter is made of:

One of the following elements has an atomicity of ‘one’. This element is:

Molecular compounds are usually formed by the combination between:

1. A metal and a non-metal.
2. Two different non-metals.
3. Two different metals.
4. Any two gaseous elements.

Find out the false sentences.

If the temperature of an object is 268K, it will be equivalent to:

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:

Method used for separating dyes in ink is called __________?

Dalton’s atomic theory successfully explained:
(i) Law of conservation of mass.
(ii) Law of constant composition.
(iii) Law of radioactivity.
(iv) Law of multiple proportion.

Name a technique used to separate.Carbon and sulphur:

The Latin language name of an element is natrium. The English name of this element is:

1. Sodium.
2. Potassium.
3. Magnesium.
4. Sulphur.