Structure of Atom Quiz 14 – Punjab Meritorious School Preparation Portal

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Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1

Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1

Statement - 1 is True, Statement- 2 is False

Statement -1 is False, Statement -2 is True

The electrons identified by quantum numbers n and l :

(A) n = 4, l = 1

(B) n = 4, l = 0

(D) n = 3, l = 1

can be placed in order of increasing energy as :

(D) < (B) < (C) < (A)

(B) < (D) < (A) < (C)

(A) < (C) < (B) < (D)

Statement-1 : The radius of the first orbit of hydrogen atom is 0.529 Å.

Statement-2 : Radius of each circular orbit (r_n) - 0.529Å (n²/Z), where n = 1, 2, 3 and Z = atomic number.

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1

Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1

Statement - 1 is True, Statement- 2 is False

Statement -1 is False, Statement -2 is True

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1

Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1

Statement - 1 is True, Statement- 2 is False

Statement -1 is False, Statement -2 is True

The de-Broglie wavelength of a particle with mass 1 kg and velocity 100 m/s is

Given that the abundances of isotopes ⁵⁴Fe, ⁵⁶Fe and ⁵⁷Fe are 5%, 90% and 5%, respectively, the atomic mass of Fe is

55.85

55.95

55.75

56.05

Statement-1 : The position of an electron can be determined exactly with the help of an electron microscope.

Statement-2 : The product of uncertainty in the measurement of its momentum and the uncertainty in the measurement of the position cannot be less than a finite limit.

Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1

Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement - 1

Statement - 1 is True, Statement- 2 is False

Statement -1 is False, Statement -2 is True

A 600 W mercury lamp emits monochromatic radiation of wavelength 331.3 nm. How many photons are emitted from the lamp per second? h = 6.62 × 10^–34 Js velocity of light = 3 × 10⁸ ms^–1

The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [a₀ is Bohr radius] :

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