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Q. Which among the given in automobile exhaust can cause cancer
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Q. The time of exposure required for taking photograph of an object depends upon –
Q. Which among the given is the hardest element?
Q. Potassium Permanganate is used for purifying drinking water, because
Q. Pigmentation of skin is due to
Q. Ozone saves the biosphere by absorbing high energy radiations called _____.
Q. The blue colour of sky is due to the phenomenon of
Q. Chlorophyll is a naturally occurring chelate compound in which central metal is
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