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The material generally used for sound pr...

The material generally used for sound proffing of rooms like a recording studio and auditorium, etc. is

A

cotton

B

coir

C

wood

D

styro foam

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The correct Answer is:
d
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TRUEMAN BIOLOGY-NCERT Exemplar Questions +2 (ENVIRONMENTAL ISSUES )-MCQs
  1. Non-biodegradable pollutants are created by :

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  2. According to Central Pollution Control Board (CPCB), which particular ...

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  3. The material generally used for sound proffing of rooms like a recordi...

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  4. Compressed Natural Gas (CNG) is

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  5. World's most problematic aquatic weed is

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  6. Which of the following causes biomagnification

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  7. The expanded form of DDT is

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  8. Which of the following materials takes the longest time for biodegrada...

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  9. Choose the incorrect statement.

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  10. Among the following which one causes more indoor chemical pollution ?

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  11. The green scum seen in the freshwater bodies is

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  12. The loudness of a sound that a person can withstand discomfort is abou...

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  13. The major source of noise pollution, world wide is due to:

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  14. Match correctly the following and choose the correct option The corr...

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  15. Catalytic converters are fitted into automobiles to reduce emission of...

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  16. Why is it necessary to remove sulphur from petroleum products ?

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  17. Which one of the following impuritites is easiest to remove from waste...

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  18. Which one of the following diseases is not due to contamination of wat...

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  19. Nuisance growth of aquatic plants ,bloomforming algae in natural water...

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  20. Algal blooms impart a distinct colour to water due to

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