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JEE Main Test 134

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JEE Main Test 134
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  • Question 1
    4 / -1

    Solution

     

  • Question 2
    4 / -1

    Upon heating with Cu2S, the reagent(s) that given copper metal is/are

    Solution

    All the given compounds except CuFe2S2 will gives copper directly on heating with But heating or Roasting converts CuFe2S2 into Cu2S and FeO (removed as a slag) and Cu2S and FeS is then obtained as copper matte.

    The matte ion reaction with hot compressed are gives FeO and Cu2O . Cu2O then reduce the Cu2S to Cu

     

  • Question 3
    4 / -1

    Prussian blue is obtained by mixing together aqueous solution of Fe3+ salt with

    Solution

    Prussian blue – A deep blue precipitate obtained by mixig together aqueous solution of Fe3+ salt and ferroyanide.

    4Fe3+ + K4[Fe(CN)6] → Fe4[Fe(CN)6]3+12K+
                                           (Prussian blue )

     

  • Question 4
    4 / -1

    The carboxyl functional group (— COOH) is present in

    Solution

     

  • Question 5
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    Solution

     

  • Question 6
    4 / -1

    Bithional is added to soap as an additive to function as a/an

    Solution

    Bithional is an antiseptic which is generally added to medicated soaps to reduce the odour produced by bacterial decomposition of organic matter on the skin.

     

  • Question 7
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  • Question 8
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    Solution

     

  • Question 9
    4 / -1

    Solution

     

  • Question 10
    4 / -1

    The length of longer diagonal of the parallelogram constructed on 5a + 2b and a - 3b, if it is given that |a| = 2√2, |b| = 3 and the angle between a and b is π/4 is

    Solution

     

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