Refrigerators keep food unspoiled because
A. at its low temperature, bacteria and moulds are inactive
B. at its low temperature, the germs are killed
C. at its low temperature, the germs are frozen
D. it sterilises the food
Answer: Option A
A. at its low temperature, bacteria and moulds are inactive
B. at its low temperature, the germs are killed
C. at its low temperature, the germs are frozen
D. it sterilises the food
Answer: Option A
The advantage of detergents over soaps is
A. detergents are soluble in water
B. detergents could not givemuch lather
C. detergents give lather even with hard water
D. soaps give lather with only soft water
A. 1 and 2
B. 2 and 3
C. 2, 3 and 4
D. 1, 3 and 4
Bakelite is a co-polymer of phenol and
A. formaldehyde
B. acetaldehyde
C. benzaldehyde
D. cinnamaldehyde
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