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(A) : Instead of pesticides, herbicides ...

(A) : Instead of pesticides, herbicides like `NaClO_3, Na_3AsO_3` are used in agriculture sector.
(R) : The fields sprayed with herbicides are more easily attacked by insects and plant diseases

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-LEVEL - I (EXERCISE-II) (Terms & segments , Air pollution , Water pollution , Soil Pollution Control of environmental pollution , Green Chemistry)
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  3. (A) : Instead of pesticides, herbicides like NaClO3, Na3AsO3 are used ...

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  7. Which of the following is environmental friendly reaction

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  8. CH2=CH2+O(2)overset(" onestepoxidation")underset("metal ions")rarrunde...

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  9. (A): Concentration of soluble F^(-) ions in drinking water about 1 ppm...

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  10. 100 ml of sample of water requires 3.92 mg of K2 Cr2O3 in presence of ...

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  11. A sample of pond water containing 20mg of organic matter requires 16 m...

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  12. Which of the following statements is false?

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  13. A,B,C and D are four 100-mlL samples of water. Fluoride ion concentrat...

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  14. Some statements regarding air pollution are given. Among them, the cor...

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  15. 10^(-3) gm equivalents of K(2) Cr(2) O(7) in 50% H(2) SO(4) is needed...

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  16. Green house gases radiate back the following radiations to the earth s...

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  17. (A): Photo chemical smog is Oxidising in nature (R): Photo chemical...

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