General Science MCQ – 48 (Chemistry)

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1. How many orbitals can have the following set of quantum numbers, n = 3, l I = 1, m1 = 0?
(A) 3
(B) 1
(C) 4
(D) 2

2. Electronic configuration of the outer shell of the element Gd with atomic number 64 is?
(A) 4f⁴ 5d⁵ 6s¹
(B) 4f³ 5d⁵ 6s²
(C) 4f⁵ 5d⁴ 6s¹
(D) 4f⁷ 5d¹ 6s²

3. A maximum number of electrons in a subshell can be?
(A) 4l + 2
(B) 4l – 2
(C) 2n²
(D) 2l + 1

4. The orientation of atomic orbitals depends on them?
(A) Spin quantum number
(B) Magnetic quantum number
(C) Azimuthal quantum number
(D) Principal quantum number

5. A gas X has C_p and C_v ratio as 1.4 at NTP 11.2 L of gas X will contain _______ number of atoms?
(A) 1.2 x 10²³
(B) 3.01 x 10²³
(C) 2.01 x 102³
(D) 6.02 x 10²³

6. The number of unpaired electrons in N2+?
(A) 3
(B) 1
(C) 2
(D) 0

7. The excitation energy of a hydrogen atom from its ground state to its third excited state is?
(A) 12.75 eV
(B) 0.85 eV
(C) 10.2 eV
(D) 12.1 eV

8. 3p orbital has ____ radial nodes?
(A) 3
(B) 2
(C) 1
(D) 0

9. A 0.66 kg ball is moving with a speed of 100 m/s. Find its wavelength?
(A) 6.6 x 10^-34m
(B) 6.6 x 10^-32m
(C) 1.0 x 10^-32m
(D) 1.0 x 10^-35m

10. Orbital angular momentum of p electrons is?