Which of the following are the ingredients of gun metal?
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From which mineral is radium obtained?
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What is laughing gas?
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Actinides are the elements with atomic numbers from
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The two elements that are frequently used for making transistors are:
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The filament of an electric bulb is made of
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Diamond is an allotropic form of:
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In fireworks, the green flame is produced because of
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Permanent hardness of water can be removed by adding:
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Marsh gas is
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LPG consists of mainly:
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Air is a/an:
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Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
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Balloons are filled with
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Which of the following does not contain a coinage metal?
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Which metal pollute the air of a big city?
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Bell metal is an alloy of
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Water is a good solvent of ionic salts because:
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Which of the following is not an isotope of hydrogen?
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The main constituents of pearls are
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