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Chemistry Test ...

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  • Question 1
    3 / -1

    350 cm3 of CH4 and 175 cm3 of an unknown gas ‘A’ diffused in the same time under similar conditions.  The molecular mass of gas A is _______.

  • Question 2
    3 / -1

    Number of electrons having m = -1 in phosphorus atom is _______.

  • Question 3
    3 / -1

  • Question 4
    3 / -1

    The heat of neutralisation of a strong acid by a strong base is 57.3 KJ mol–1. The heat released when 0.5 mol HNO3 is mixed with 0.2 mol KOH in aqueous medium is ______KJ.

  • Question 5
    3 / -1

    The mass of ascorbic acid (C6H8O6) to be dissolved in 100 g of acetic acid to lower its freezing point by 1.5oC is _______g.

    (Where Kf for acetic acid is 4.0 K-Kg-mol-1)

  • Question 6
    3 / -1

    According to van’t Hoff equation, K varies with temperature as

  • Question 7
    3 / -1

    The variation of molar conductively with concentration of an electrolyte (X)in aqueous solution is shown in the given figure

    The electrolyte X is:

  • Question 8
    3 / -1

    The rate constant of a first order reaction is 6.909 min-1.  So, the time required for the completion of 75% of the same reaction in minutes is

  • Question 9
    3 / -1

    Which of the following reactions is an example of heterogenous catalysis?

  • Question 10
    3 / -1

    The equation used to represent the electron gain enthalpy is

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