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Chemistry Test ...

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  • Question 1
    1 / -0

    The fundamental particles present in equal numbers in neutral atoms are

  • Question 2
    1 / -0

    TEL minimise the knocking effect when mixed with petrol, it acts as_______

  • Question 3
    1 / -0

    What is the chemical name of the compound

    Cu2CO3

  • Question 4
    1 / -0

    "If a system A is in thermal equilibrium with B and B is in thermal equilibrium with C, then A and C are in equilibrium with each other". This is a statement of

  • Question 5
    1 / -0

    A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at :

  • Question 6
    1 / -0

    Which one of the following can be used to confirm wether drinking water contains a gamma emitting isotope or not

  • Question 7
    1 / -0

    The charge on positron is equal to the charge on

  • Question 8
    1 / -0

    Which of the following are chemical changes?

    A) Cooking of Food

    B) Digestion of Food

    C) Freezing of water

    D) Water is heated up

  • Question 9
    1 / -0

    Which of the following reactions are exothermic?

    (1) C + O2 → CO2

    (2) 2Mg + O2 → 2MgO

    (3) CuSO4 + 5H2O → CuSO4.5H2O

    (4) All the above

  • Question 10
    1 / -0

    Permanent Hardness of water can be removed by adding

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