Preparation from Magnesium

Q.

Name one metal when placed in ferrous sulphate solution will discharge its green colour. Write a chemical equation and state the reasons also. [3 MARKS]

Q.

(a) A metal in the powdered form reacts very slowly with boiling water, but it decomposes in steam. Name the metal.

(b) Write a balanced equation for the reaction occuring in (a).

Q.

A saturated solution of copper sulphate was prepared at $60°\mathrm{C}$ and put in three tubes X, Y and Z.

(i) Tube X is heated to $95°\mathrm{C}$.

(ii) Tube Y is cooled to $25°\mathrm{C}$.

(iii) 10 ml. of water is added to tube Z.

Q.

Give the principles of:

(i) Hydraulic washing

Q.

Which of the following elements react with dilute nitric acid to produce hydrogen gas?

1. Copper

2. Manganese

3. Iron

4. Mercury

Q. The evolution of hydrogen gas on reaction with $HCl$ is faster for magnesium than for aluminium.

1. False
2. True