Q. Rocks of the building are made by blocks using mortar with the element

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Q. Sand and rocks further added to cement becomes

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Q. The process of decomposition of calcium carbonate (CaCO₃) and formation of calcium oxide (CaO) and carbon dioxide (CO₂) takes place in

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Q. MgO is used to line kilns and furnaces because of its

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Q. Lime used by farmers to raise the pH of the soil is

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Q. Excess acids in the stomach can be neutralized through

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Q. Slaked lime is used

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Q. Metal oxide that turns into cement upon roasting with clay is

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Q. Halogen alkanes are naturally found and are

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Q. Depleting of CFCs caused a serious environmental hazard i.e.

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Q. The effects of CFC can be retained in the atmosphere for up to a/an

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Q. (Chloro Fluoro Carbons) CFCs are not

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Q. The protection of earth from harmful rays of the sun is done by

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Q. CFCs stands for

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Q. CFCs are not dangerous on earth, the problem starts when they start diffusing in

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Q. Non-stick lining of a sauce pan is due to halogen-polymer named as

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Q. Teflon is the trade name for

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Q. Each chlorine ion tends to destroy oz1 molecules in an amount

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Q. Chemically chlorofluorocarbons are

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Q. Introducing a halogen atom into an alkene can greatly reduce its

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