Which of the following is used in gunpowder?
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The common name of dichlorodifluoromethane is _____.
Which of the following is a natural polymer?
Molybdenite is an ore/mineral of
Which of the following is a greenhouse gas or a gas which can deplete the ozone layer?
What is the percentage of methane in biogas?
Glass is also called ________.
Who among the following laid the foundation of chemical sciences by establishing two important laws of chemical combination?
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