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Chemistry Test 199

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Chemistry Test 199
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Weekly Quiz Competition
  • Question 1
    4 / -1

    Find the incorrect combination of reaction and reaction name.

    Solution

     

  • Question 2
    4 / -1

    For a 1st order reaction, the correct graph showing variation of half-life (t1/2) with inverse of Kelvintemperature (1/T) will be -

    Solution

     

  • Question 3
    4 / -1

    During Froath Floatation process, use of depressant is :

  • Question 4
    4 / -1

    Which sugar is composed only of β-D-glucose units ?

    Solution

    Cellulose is a linear polymer of D-glucose units joined by β-glycosidic linkage.

     

  • Question 5
    4 / -1

    Due to non-stoichiometric defect, a sample of cuprous oxide is found to have a composition Cu1.8O.The mole % of Cu2+ in total copper content of the crystal will be -

    Solution

     

  • Question 6
    4 / -1

    A salt impart red colour to the borax bead in reducing flame, what could be the colour of the bead in oxidisingflame.

    Solution

     

  • Question 7
    4 / -1

    Which of the following is a condensation copolymer?

    Solution

    Bakelite is formed from a condensation reaction of phenol with formaldehyde.

     

  • Question 8
    4 / -1

    The abnormal molecular mass of CH3COOH when dissolved in benzene is found to be 80 g/mol. The percentage of CH3COOH present in dimeric form in solution is -

    Solution

     

  • Question 9
    4 / -1

    Which of the following pair of cations can be separated by using excess NH3 solution?

    Solution

    Bi3+ + excess NH3 → Bi(OH)3 ↓ (white)

    Al3+ + excess NH3 → Al(OH)3 ↓ (white)

    Zn2+ + excess NH3 → Zn(NH3)3 (clear)

    Hg2+ + excess NH3 → HgO.HgNH2 ↓

    Pb2+ + excess NH3 → Pb(OH)2↓

    Cu2+ + excess NH3 → Cu(NH3)42+ (clear)

    Cd2+ + excess NH3 → Cd(NH3)42+ (clear)

     

     

  • Question 10
    4 / -1

    Select the cationic detergent amongst the following.

    Solution

     

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