NDA CHEMISTRY QUIZ

Question 1:

Number of core electron present in [Ne]3s¹ is

1

10

8

11

Question 2:

The orbitals having the same energy are called degenerate orbitals. Which of the following set of orbitals is degenerate for hydrogen atom ?

2p , 1s , 2s

4s , 3s , 5s

4s, 4p, 4d

2s , 1s, 3s

Question 3:

The second excited state for hydrogen atom is

3s , 3p , 3d

2s , 2p

4s , 4p , 4d , 4f

1s

Question 4:

The energy required to remove an electron completely from the n = 2 orbit is

5.45 X 10^-19 J

6.45 X 10^-19 J

3.45 X 10^-19 J

4.45 X 10^-19 J

Question 5:

Which of the following electronic configuration is most stable ?

1s²2s²2p¹

1s²2s²2p⁴

1s²2s²2p³

1s²2s²2p⁶

Question 6:

Which one of the following is electronic configuration for sulphur atom ?

[Ne]3s²3p⁵

[Ne]3s²3p³

[He]3s²3p²

[Ne]3s²3p⁴

Question 7:

Electronic configuration of Ni⁺² is

[Ar] 3d⁶ 4s²

[Ar] 3d⁸

[Ar] 3d⁸ 4s²

[Ar] 3d⁸ 4s¹

Question 8:

The wavelength of an electron moving with a velocity of 2.05 × 10⁷ m s^-1 is

2.55 X 10^-11 m

5.55 X 10^-11 m

3.55 X 10^-11 m

4.55 X 10^-11 m

Question 9:

What designation is given to the orbital having n = 5 and l = 4 ?

5s

5p

5g

5h

Question 10:

Which of the following configuration violates the Afbau principle ?

1s²2s¹

1s²2s²

1s²2s²2p⁶

1s²2p⁶2s¹

NDA CHEMISTRY QUIZ - 15

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NDA CHEMISTRY QUIZ - 15

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