Q721
Open questionWhich of the following is not a nitrogenous fetiliser?
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Q722
Open questionWhich one of the following is used as a sowing agent in the preparation of soft drinks?
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Q723
Open questionPyrethrin used in mosquito coil is obtained from
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Q724
Open questionWhat is a common name for the substance which irritates lachrymal glands ?
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Q725
Open questionThe material used in solar cells contains
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Q726
Open questionWhich of the following is used to iodise common salt ?
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Q727
Open questionA thick paste of cement, sand and water is called
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Q728
Open questionWhat is the most commonly used substance in fluorescent tubes?
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Q729
Open questionTear gas is :
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Q730
Open questionTetra ethyle lead (TEL) is
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Q731
Open questionThe drug ‘Marijuana’ is a
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Q732
Open questionThe Refrigerant 'FREON' is
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Q733
Open questionThe chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are
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Q734
Open question'Fire-fighting clothes' are made from
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Q735
Open questionTrinitrotoluene is
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Q736
Open questionThe chief source for the production of nitrogeneous fertilizers is :
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Q737
Open questionWhich one of the following elements is used in the manufacture of safety matches?
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Q738
Open questionZinc sulphide is commonly used as
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Q739
Open questionWhich halide is used in making sensitive emulsion on photograhic film?
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Q740
Open questionDetergents clean surfaces on the principle of
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