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GS
GS Set-1
Chemistry
Inorganic Chemistry
17

Inorganic Chemistry MCQ with Answers

17) According to Bohr theory, the angular momentum of an electron in 5^th orbit is:

25h ⁄ π

h ⁄ π

10h ⁄ π

2.5h ⁄ π

Answer is:

2.5h ⁄ π

Explanation:

mvr = nh ⁄ 2π

Inorganic Chemistry MCQ with Answers

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18) The ratio of ionisation energy of He and Be³⁺ is:

1:01

1:03

1:09

1:16

Answer is:

0.052777778

Explanation:

Ionisation energy is directly proportional to Z²

19) The relative penetrating power of α, β, γ and neutron (n) follows the order:

α > β > γ > n

n > γ > β > α

β > α > n > γ

None of these

Answer is:

None of these

20) The wavelengths of electron waves in 2 orbits is 3 : 5. The ratio of kinetic energy of electrons will be:

25:09:00

5:03

9:25

3:05

Answer is:

1.047916667

Explanation:

Kinetic energy is inversely proportional to square of wavelength.

21) Correct order of polarizing power is:

Cs⁺ < K⁺ < Mg²⁺ < Al³⁺

Al³⁺ < Mg²⁺ < K⁺ < Cs⁺

Mg²⁺ < Al³⁺ < K⁺ < Cs⁺

K⁺ < Cs⁺ < Mg²⁺ < Al³⁺

Answer is:

Al³⁺ < Mg²⁺ < K⁺ < Cs⁺

Explanation:

Larger the size of cation, less it polarizes the anion based on Fajan′s Rule.

Inorganic Chemistry MCQ with Answers

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17) According to Bohr theory, the angular momentum of an electron in 5th orbit is:

2.5h ⁄ π

Inorganic Chemistry MCQ with Answers

Related Inorganic Chemistry MCQ with Answers

18) The ratio of ionisation energy of He and Be3+ is:

0.052777778

19) The relative penetrating power of α, β, γ and neutron (n) follows the order:

None of these

20) The wavelengths of electron waves in 2 orbits is 3 : 5. The ratio of kinetic energy of electrons will be:

1.047916667

21) Correct order of polarizing power is:

Al3+ < Mg2+ < K+ < Cs+

Inorganic Chemistry MCQ with Answers

17) According to Bohr theory, the angular momentum of an electron in 5^th orbit is:

18) The ratio of ionisation energy of He and Be³⁺ is:

Al³⁺ < Mg²⁺ < K⁺ < Cs⁺