Q. The most abundant element in the earth’s atmosphere is
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Q. With reference to metals and their ores, which of the following pairs is INCORRECT?
Q. The main compound formed during the fermentation of cane juice is
Q. Which of the following acids is present in ant bites?
Q. How many moles are there in 140g of Si (atomic mass of silicon is 28)
Q. Chernobyl disaster is the result of pollution by
Q. Of the following which one pollutes the air of a big city ?
Q. Which one of the following statements is correct?
Q. In galvanization, iron is coated with
Q. The greatest number of compounds are formed by the element
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