Science : Ch 03 – Metals and Non-metals

Which one of the following metals does not respond with cold as well as hot water?

The solution of one of the following compounds will not conduct electricity. This compounds is:

An aluminium strip is retained immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change state is that:

Generally, metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?

Metals are solid in nature. Which one of the Subsequent metals is found in liquid condition at room temperature?

Non-metals are not lustrous. Which of the following non-metals is lustrous?

The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?

Electrical wires have a coating of an insulating material. The material, overall adopted is:

What occurs when calcium is treated with water?

1. It does not react with water.
2. It reacts violently with water. I
3. t reacts less violently with water.
4. Bubbles of hydrogen gas formed stick to the surface of calcium.

Metal that is best conductor of electricity

Give the formula of the stable binary compound that would be formed by the combination of following pair of elements: Mg and N₂

Give the formula of the stable binary compounds that would be formed by the combination of following pair of elements: K and O₂

Name two metals having melting point less than 310 K (37°C).

which metal is more reactive?

Which metal is less reactive?