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Q. Percentage of carbon in steel ranges from
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Q. Which of the following is an ore of iron?
Q. Which among the given is a scalar quantity -
Q. The highest volume of gases in lower atmosphere is comprised of
Q. The material which can be deformed permanently by heat and pressure is called a
Q. The vitamin which is generally excreted by humans in urine is
Q. Which among the given substance's smell is similar to Ethanoic acid -
Q. Which of the following is a secondary air pollutant?
Q. _________ is a by product of sewage treatment & can be decomposed to produce biogas
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