Permanent hardness of water can be removed by adding
chlorine
washing soda
potassium permanganate
bleaching powder
Additional Questions
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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? |
Answer |
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Balloons are filled with |
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Which of the following does not contain a coinage metal? |
Answer |
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Which metal pollute the air of a big city? |
Answer |
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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? |
Answer |