Q221
Open questionWhich of the following is a natural polymer?
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Q222
Open questionPlastic is a type of
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Q223
Open questionPolythene is polymer of
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Q224
Open questionGlycol is used to manufacture which of the following ?
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Q225
Open questionSilk fibre chemically is :
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Q226
Open questionWhat is the chemical symbol of mercury?
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Q227
Open questionWhich of the following is a monoatomic gas?
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Q228
Open questionThe purest form of water in nature is
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Q229
Open questionIn drinking water supply, which of the following treatments is not involved
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Q230
Open questionThe two metal ions that cause hardness to water are:
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Q231
Open questionBleaching powder is used in drinking water as a/an
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Q232
Open questionThe process of removing calcium and magnesium from hard water is known as
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Q233
Open questionHard water and soft water can be distinguished by using
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Q234
Open questionWhich method will be employed to test the hardness of water?
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Q235
Open questionThe purest form of water is
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Q236
Open questionWater cycle refers to
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Q237
Open questionPermanent hardness of water may be removed by addition of
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Q238
Open questionAcid rain is caused due to pollution of atmosphere by
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Q239
Open questionWhat are the components responsible for acid rain?
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Q240
Open questionWhich gas emitted by power stations causes acid rain?
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