Alloys, Carbon & Its Various Forms, Hydrogen & Compounds, Sulphur, Nitrogen, Halogen & Inert Gases - Category Wise Question And Answer Practice Test With Solutions

Question : 1 [IAS (Pre) 1999]

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

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

Which of these statements are correct?

a) 2 and 4

b) 1 and 4

c) 2 and 3

d) 1 and 2

Answer »

Question : 2 [IAS (Pre) 2000]

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

Answer »

Question : 3 [UPPCS (Mains) 2016]

The soil in which insectivorous plants grow is deficient in

a) Calcium

b) Nitrogen

c) Magnesium

d) Water

Answer »

Question : 4 [PCS (Pre) 2005]

Permanent hardness of water is due to

a) Clorides of Silver and Potassium

b) Magnesium bicarbonate

c) Chlorides and sulphates of Calcium and Magnesium

d) Calcium bicarbonate sulphates

Answer »

Question : 5 [UP (Pre) 2015]

Which one of the following fuels causes minimum air pollution?

a) Diesel

b) Coal

c) Kerosene oil

d) Hydrogen

Answer »