Question

Identify the substances A, B, C, D and E in each case, based on the information given below [5]

i) A compound 'A' present in common salt which makes it sticky during the rainy season.

ii) A gas ‘B' produced when boiling water is poured over magnesium.

iii) An orange coloured substance ‘C' which on heating turns to green voluminous mass with flashes of

light.

iv) A crystalline blue coloured substance ‘D' which turns to white powder on heating.

v) A compound ‘E' which turns yellow on heating and becomes white on cooling.​

Answer 1

Answer:

1. Magnesium chloride
2. Hydrogen gas
3. Potassium dichromate
4. Hydrous copper sulphate
5. Zinc oxide