set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following fuels causes minimum air pollution?

a) Diesel

b) Coal

c) Kerosene oil

d) Hydrogen

Question : 2

Heavy water is that water

a) In which isotopes takes place of Oxygen

b) In which isotopes takes place of Hydrogen

c) The temperature of which is kept constant at 4ºC

d) In which insoluble salts of Calcium and Potassium are present

Question : 3

The foul smell of dead fish is due to the compound

a) Aldehydic compounds

b) Sulphur compounds

c) Amino compounds

d) Nitro compounds

Question : 4

The soil in which insectivorous plants grow is deficient in

a) Calcium

b) Nitrogen

c) Magnesium

d) Water

Question : 5

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 : 6

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