Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 86

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If $E_{1}, E_{2}$ and $E_{3}$ represent respectively the kinetic energies of an electron, an $α$ -particle and a proton each having same de-Broglie wavelength, then

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Important Questions on Structure of Atom

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 87

As electron moves away from the nucleus, its

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 88

In Bohr's model of hydrogen atom, the period of revolution of an electron in the

1

^st orbit to that in the

2

^nd orbit are in the ratio

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 89

Three energy levels and the wavelengths of the lines produced by transitions are shown in the figure below:

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Which one of the following relationships is correct?

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 90

The energy absorbed by each molecule (

A_{2}

) of a substance is

4.4 \times 10^{- 19} J

and bond energy per molecule is

4.0 \times 10^{- 19} J

. The kinetic energy of the molecule per atom will be

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 91

The species

Ar, K^{+}

and

{Ca}^{2 +}

contain the same number of electrons. In which order do their radii increase?

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 92

Which one is the wrong statement?

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 93

Which of the following statement regarding spectral series is/are correct ?

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Pradeep's Chemistry Vol 1>Chapter 2 - Structure of Atom>Competition Focus>Q 94

The orbitals which have same number of nodes are