GROWTH AND NUTRITION OF BACTERIA QUESTIONS

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51. Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
A. Television
B. Refrigerator
C. Tube light
D. Cooking gas

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.
52. Balloons are filled with
A. nitrogen B. helium
C. oxygen D. argon

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.
53. Which of the following does not contain a coinage metal?
A. Silver and Gold
B. Zinc and Gold
C. Copper and Silver
D. Copper and Gold

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.
54. Which metal pollute the air of a big city?
A. Copper B. Chromium
C. Lead D. Cadmium

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.
55. Bell metal is an alloy of
A. nickel and copper
B. zinc and copper
C. brass and nickel
D. tin and copper

Answer: Option D

Explanation:

No answer description available for this question.

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