Q. The metal used for the manufacturing of fibre-glass is

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Q. The name halogen is derived from Greek word which means

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Q. KCl.MgCl₂.6H₂O is the chemical formula of

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Q. Calcium burns in air giving a mixture of

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Q. The melting point of tungsten is

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Q. Soft metals are present in group

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Q. 0.53 g/cm³ is a density of

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Q. The reactivity of halogens down the group

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Q. Cu, Au and Ag are commonly known as

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Q. Chlorine reacts with methane in the sunlight to produce

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Q. Formation of Grignard's reagent involves following equation C₂H₅I + Mg →

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Q. The ionization energy of group I and II decreases and their reactivities

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Q. Magnesium has great affinity for

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Q. Which one of the following is used to kill bacteria in drinking water and swimming pools?

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Q. The melting point of Mercury is

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Q. Which one of the following is insoluble in water?

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Q. The reactivities of metals of group-I and II are related to the

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Q. One of the main use of magnesium is preparation of

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Q. It is the ability of an element to react with others

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Q. They give stable carbides with carbon

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