Q. In flares production, mostly the fine powder used is of

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Q. Hot magnesium reacts with water to yield

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Q. Decoy magnesium flares give off heat confuses the infrared detection system in missiles so the enemy can not

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Q. When magnesium is burnt on Bunsen burner it gives flame of color

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Q. The calcium oxide reacts with water readily to make a solution which is weakly

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Q. Going down the group the Group-II elements are more

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Q. Strontium (Sr) compounds put on a nichrome (NiCr) wire and heated gives of color

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Q. What is true about metals?

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Q. The percentage of a sample of HBr decomposes at 430 °C. is

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Q. Down the group, the hydrogen halides could be

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Q. Halogens dissolve well in

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Q. Oxidation of hydrogen halides become easier going

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Q. Halogens react with hydrogen gas to form

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Q. The halogens get less reactive

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Q. Poisonous gases are formed with reactions of halogens and sulfuric acid that's why it should be handled

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Q. The halogens reacts with non-metals forming

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Q. HCl is mostly visible in the form of

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Q. Each halogen atom tends to gain 1e⁻ when it reacts with

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Q. A precipitate will be formed if an unknown compound is added in dilute

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Q. The highly reactive element which can burn glass, metals, and water in a stream of gas is even when cold is

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