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Chemistry Test ...

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  • Question 1
    4 / -1

    How many number of molecules and atoms respectively are present in 2.8 litres of a diatomic gas at STP?

  • Question 2
    4 / -1

    Total number of atoms present in 34g of NH3 is

  • Question 3
    4 / -1

    The orientation of an atomic orbital is governed by [2006]

  • Question 4
    4 / -1

    If uncertainty in position and momentum are equal, then uncertainty in velocity is : [2008]

  • Question 5
    4 / -1

    The measurement of the electron position if associated with an uncertainty in momentum, which is equal to 1 × 10–18 g cm s– 1 . The uncertainty in electron velocity is? (mass of an electron is 9 × 10– 28 g) 
    [2008]

  • Question 6
    4 / -1

    Which among the following elements has maximum atomic radius ?

  • Question 7
    4 / -1

    The relative atomic masses of all elements have been found with respect to an atom of ________.

  • Question 8
    4 / -1

    Until what element was the Law of Octaves determined to be applicable?

  • Question 9
    4 / -1

    The qualities of eka-aluminium predicted by Mendeleev are the same as the properties of the element aluminium, which was discovered later.

  • Question 10
    4 / -1

    The arrangement of elements in the Modern Periodic Table is based on their\s

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