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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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TRUEMEN BIOLOGY ENGLISH-NCERT Exemplar Questions +2 (ENVIRONMENTAL ISSUES )-MCQs
  1. Non-biodegradable pollutants are created by :

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

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  3. Compressed Natural Gas (CNG) is

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  4. World's most problematic aquatic weed is

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  5. Which of the following causes biomagni- fication

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  6. The expanded form of DDT is

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

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  8. Choose the incorrect statement.

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

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  10. The green scum seen in the freshwater bodies is

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  11. The loudness of a sound that a person can withstand without discomfort...

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

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

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

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  15. Which one of the following impurities is easiest to remove from wastew...

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

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  17. Nuisance growth of aquatic plants and bloom-forming algae in natural w...

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

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  19. In the textbook you came acroos Three Mile Island and Chernobyl disast...

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