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Chemistry Test ...

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  • Question 1
    4 / -1

    The frequency of radiation emitted when the electron falls from n = 4 to n = 1 in a hydrogen atom will be (Given ionization energy of H=2.18 ×10–18J atom–1and h = 6.625 × 10–34 J s ) [2004]

  • Question 2
    4 / -1

    What is the mass of carbon dioxide which contains the same number of molecules as are contained in 40 g of oxygen?

  • Question 3
    4 / -1

    The density of a gas is 1.78 g L-1 at STP. The weight of one mole of gas is

  • Question 4
    4 / -1

    The following quantum numbers are possible for how many orbital (s) n = 3, l = 2, m = +2 ? [2001]

  • Question 5
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    The value of Planck's constant is 6.63 × 10–34 Js.The velocity of light is 3.0 × 108 m s–1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 × 1015 s–1 ? [2003]

  • Question 6
    4 / -1

    The Mass of Atom is entirely due to ________.

  • Question 7
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    The element having tetra-atomic atomicity is ______ .

  • Question 8
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    Alkali metals are assigned which group in the Modern Periodic Table?

  • Question 9
    4 / -1

    Who was the first to propose Atomic Theory?

  • Question 10
    4 / -1

    What is common among Lithium, Sodium and Potassium?

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