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Chemistry Test ...

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  • Question 1
    4 / -1

    In 2HI ⇌ H2 + I2, the equilbrium is not affected by:

  • Question 2
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    When a number 3.56923 *103 is expressed in four significant figures, it becomes

  • Question 3
    4 / -1

    Insulin regulates the metabolism of

  • Question 4
    4 / -1

    Consider the following skeleton equation:

    __As2O3 + __SnCl2 + __HCl → __SnCl4 + __As + __H2O

    What are the stoichiometric coefficients of As2O3, SnCl2, HCl, SnCl4, As and H2O, when the above equation is balanced?

  • Question 5
    4 / -1

    The rate constant of a first order reaction is 3 * 10-6 per second and initial concentration is 0.10 M. The initial rate of reaction is

  • Question 6
    4 / -1

    Directions: The following question has four choices out of which ONLY ONE is correct.

    Dissolution of ammonium chloride in water is an endothermic change. At constant temperature, it is accompanied by

  • Question 7
    4 / -1

    Coagulation of lyophobic colloids can be carried out by

  • Question 8
    4 / -1

    Which of the following pairs has the highest heat of neutralisation?

  • Question 9
    4 / -1

    Directions: The following question has four choices out of which ONLY ONE is correct.

    The enthalpy of neutralization of HCN by NaOH is - 12kJ/mol. The enthalpy of ionization of HCN is

  • Question 10
    4 / -1

    Hydrolysis of DDT is a first order reaction. Its half-life is 10 year. Time to hydrolyse 10 g DDT to half of its original amount is

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