Welcome to your Science Quiz 33
1.
Soft drinks such as colas contain significant quantities of: [2000]
2.
Aluminium surfaces are often ‘anodized’. This means the deposition of a layer of: [2000]
3.
A small pouch containing silica gel is often found in bottles of medicine in tablet or powder form because silica gel: [2000]
4.
Match List I (Industrial processes) with List II (Industry with which associated) and select the correct answer using the codes given below the Lists: [2000]
List I
- Cracking
- Smelting
III. Hydrogenation
- Vulcanization
List II
- A) Rubber
- B) Petroleum
- C) Copper
- D) Edible fats
5.
Assertion (A): Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons. [2000] Reason (R): Ammonia can be liquified at ambient temperatures at low pressures.
6.
The stones formed in human kidney consist mostly of: [2000]
7.
Consider the following: Hard water is not suitable for: [2000]
I. Drinking.Â
II.Washing clothes with soap.
III. Use in boilers.Â
IV. Irrigating crops.
8.
Consider the following statements: An ordinary light bulb has a rather short life because the: [1999]
I. Filament wire is not uniform.Â
II. Bulb cannot be evacuated completely.
III. Wires supporting the filament melt at high temperatures.
9.
Match List I (Naturally occurring substances) with List II (Elements) and select the correct answer using the codes given below the Lists: [1999]
List I
- Diamond
- Marble
III. Sand
- Ruby
List II
- A) Calcium
- B) Silicon
- C) Aluminium
- D) Carbon
10.
Cobalt-60 is commonly used in radiation therapy because it emits: [1999]
