Q641
Open questionWhich one is the most reactive halogen?
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Q642
Open questionWho first published the periodic table?
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Q643
Open questionThe most suitable vessel for storing concentrated sulphuric acid is
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Q644
Open questionWhich one of the following nonmetals shows allotropy in the liquid state?
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Q645
Open questionSulphuric acid is
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Q646
Open questionWhen conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to
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Q647
Open questionWax used for making candle is chemically a mixture of
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Q648
Open questionAdding Cl2 to benzene in the presence of AlCl3 is an example of :
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Q649
Open questionBenzene cannot undergo :
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Q650
Open questionWhich one is the simplest aromatic hydrocarbon?
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Q651
Open questionSaccharin is made up of
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Q652
Open questionThe compound to which H2 does not add is
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Q653
Open questionWhich of the following is not a nitrogenous fertilizer ?
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Q654
Open questionThe pair of compounds used as anaesthetic in medicines :
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Q655
Open questionWhich of the following is used for refrigeration?
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Q656
Open questionFreon used as refrigerant is chemically
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Q657
Open questionThe gas used for artificial fruit ripening of green fruit is
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Q658
Open questionWhich one of the following vegetable oils is used in the manufacture of paints?
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Q659
Open questionKMnO4 can be used as
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Q660
Open questionA detergent is a
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