Welcome to your Science Quiz 34
1.
Consider the following statements: Glass can be etched or scratched by: [1999]
I. Diamond.Â
II. Hydrofluoric acid.
III. Aqua Regia.Â
IV. Cone, sulphuric acid.
2.
Assertion (A): To dilute sulphuric acid, acid is added to water and not water to acid. [1999] Reason (R): Specific heat of water is quite large.
3.
Match List I with List II and select the correct answer using the codes given below the lists: [1998]
List I
- Potassium bromide
II.Potassium nitrate
III. Potassium sulphate
- Mono-potassium tartarate
List II
- A) Fertiliser
- B) Photography
- C) Bakery
- D) Gunpowder
4.
Consider the following statements: Coke is one of the materials of the charge added to blast furnaces for the production of steel/iron. Its function is to: [1998]
I. Act as a reducing agent.Â
II. Remove silica associated with the iron ore.
III. Function as fuel, to supply heat.Â
IV. Act as an oxidizing agent.
5.
Which one of the following metals does not form amalgams? [1998]
6.
Consider the following statements about acetylene: [1998]
I. It is used in welding industry.Â
II. It is raw material for preparing plastics.Â
III. It is easily obtained by mixing silicon carbide and water.
Choose the correct option.
7.
The major chemical compound found in human kidney stones is: [1998]
8.
Match List I with List II and select the correct answer using the codes given below the lists: [1998]
List I
- Blue vitriol
- Epsom salt
III. Baking soda
- Caustic soda
List II
- A) Sodium bicarbonate
- B) Sodium hydroxide
- C) Magnesium sulphate
- D) Copper sulphate
9.
Assertion (A): Formic acid is a stronger acid than acetic acid. [1998] (R): Formic acid is an organic acid.
10.
Assertion (A): The temperature of a metal wire rises when an electric current is passed through it. [1998] Reason (R): Collision of metal atoms with each other releases heat energy.
