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Q. What is the first step in the refining of petroleum?
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Q. Paper of old books turns to brownish color due to
Q. What is the chemical name of vinegar?
Q. Holography is a technique of
Q. Which statement is NOT true about polymers?
Q. Organic food is supposed to be better for human consumption because
Q. The receptors for bitter taste are located at which part of tongue?
Q. Eutrophication of a water body enhances
Q. Chlorophyll is a naturally occurring chelate compound in which central metal is
Q. The branch of medicine involving synthetic chemical compound is
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