set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Consider the following statements. Glass can be etched or scratched by

1. Diamond
2. Hydrofluoric Acid
3. Aquarregia
4. Conc. Sulphuric Acid

a) 2 and 4

b) 1 and 4

c) 2 and 3

d) 1 and 2

Question : 2

Aluminium surface is often ‘Anodized’. This means the deposition of a layer of

a) Zinc Oxide

b) Nickel Oxide

c) Chromium Oxide

d) Aluminium Oxide

Question : 3

The soil in which insectivorous plants grow is deficient in

a) Calcium

b) Nitrogen

c) Magnesium

d) Water

Question : 4

Bronze is an alloy of copper and

a) Nickel

b) Silver

c) Tin

d) Aluminium

Question : 5

According to weight, the percentage of hydrogen in water ($H_2O$), is

a) 11.11%

b) 88.89%

c) 44.45%

d) 5.55%

Question : 6

Check these statements.

1. Brass is an alloy of Copper and Zinc.
2. Magnetite is the main ore of Aluminium.
3. Mercurius Solubilis are that substance which mainly involves mercury.
4. Potassium Nitrate (KNO3 ) is a chemical used in photography.

a) 1, 3 and 4

b) 2 and 3

c) 1 and 2

d) 1 and 3