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General Science - Questions and Answers

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711. Which of the following chemicals is responsible for the depletion of ozone layer in the atomosphere ?
A. Chlorofluorocarbons
B. Nitrous oxide
C. Sulphur dioxide
D. Carbon dioxide
Explanation:
712. Which of the following vitamins is considered helpful to keep the eyes healthy ?
A. Vitamin C
B. Vitamin B complex
C. Vitamin A
D. Vitamin E
Explanation:
713. The location and energy of an electron in an atom can be specified by
A. atomic mass
B. atomic number
C. quantum numbers
D. None of these
Explanation:
714. Veins differ from arteries in having
A. thinner walls
B. strong walls
C. narrower lumen
D. valves to control direction of flow
Explanation:
715. The ten percent law related to the transfer of energy in a food chain was given by
A. Lamarck
B. Linus Pauling
C. Kindemann
D. Darwin
Explanation:
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