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Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace?

coke
cementite
coal
bauxite
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Nitrous oxide, commonly called laughing gas, has been a matter of concern to environmentalists recently because:

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The radioactive element most commonly detected in humans is

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Radioisotopes which are used in medical diagnosis are known as

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Most commercial nuclear power plants worldwide are cooled by

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Which of the following elements was unknown to ancient civilizations?

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Steel is composed of a number of elements. The two essential elements are iron and

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Which of the following is not a major pollutant from automobiles?

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The characteristic odour of Garlic is due to which one of the following?

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Which acid is produced when milk gets sour?

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When an ant bites a person, which irritating chemical it (ant) injects into his (person) body?

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