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CBSE

Chemistry

NEET Chemistry : Structure of Atom

51.

For an electron whose x-positional uncertainity is 1x 10^-10 m, the uncertainity in the x-component of the velocity in ms^-1will be of the order of:

$(Data : m_{e} = 9 \times 10^{- 31} Kg, h = 6.6 \times 10^{- 34} JS)$

52.

The correct sets of quantum numbers which represents the highest energy level in an atomis:

53.

Wave number of a spectral line for a given transition is xcm^-1 for He⁺ then its value for Be⁺ (iso electronic of H⁺) for same transition is:

54.

When electrons are trapped into the crystal in anion vacancy, the defect is known as :

55.

Total number of atoms represented by the compound CuSO₄ · 5H₂O is :

56.

The wavelength of a spectral line emitted by hydrogen atom in the Lyman series is $\frac{16}{15 R} cm$ .
The value of n, will be

[R=Rydberg constant]

57.

Which of the following have maximum number of unpaired electrons ?

58.

What is X in the following nuclear reaction?

₇N¹⁴ + ₁H¹ $\to$ ₈O¹⁵ + X

59.

If magnetic quantum number of a given atom represented by -3, then what will be its principal quantum number ?

60.

Neutron is discovered by

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