APRJC CET Chemistry Model Questions for Practice

Here we are giving some model questions for the practice of 10th Class students those appearing for APRJC Entrance Examination. Questions are given from Chemistry (Atomic Structure) along with answers at the end. Students can practice these questions for better marks.

1. The 'l' value of 'd' sub-shell is
A) 0 B) 1 C) 2 D) 3
2. The clockwise spin of the electron is represented by
A) → B) ↓ C) ← D) ↑
3. Shape of s-orbital is
A) Dumb bell B) Spherical C) Double dumb bell D) Tetra hedral
4. The number of m values for l = 3 is
A) 7 B) 4 C) 3 D) 2
5. Bohr's theory is valid for
A) All atoms B) All ions
C) Any atom or ion having 1 electron D) All molecules
6. Which of the following shells has the least energy
A) L B) M C) K D) N
7. Which of the following quantum numbers give size and energy of the stationary orbit
A) n B) l C) m D) s
8. The sub-shells present is L- shell are
A) s and d B) s and p C) s, p and d D) s, p, d and f
9. The maximum value of l for n = 5 is
A) 5 B) 3 C) -5 D) 4
10. The number of d-orbitals present in n = 3 is
A) 1 B) 3 C) 5 D) 7
11. f-orbitals are present in
A) K-shell B) L-shell C) M-shell D) N-shell
12. Orbitals having the same energy are called
A) Valence shells B) Empty shells C) Degenerate shells D) Overlapping shells
13. The distance between the nucleus and outermost orbital gives the --
14. 1s2 2s2 2p6 3s1 is the electronic configuration of the element ---
15. Atomic number of Magnesium is ---
16. The valence electronic configuration of Sodium (Z = 11) is ----
17. Among 3p, 4s, 3d and 4p, the orbitals having the least energy is ---
18. Rutherford proposed 'planetary model' based on his ---- scattering experiment.
19. Quantum theory of radiation is proposed by ---
20. The maximum value of Azimuthal quantum number 'l' for the principal quantum number n is --
21. The shape of p-orbital is----
22. After filling the 3d orbital, the electron enters into ----- orbital.

Group A Group B

23. Bohr ( ) A) Magnetic quantum number
24. Sommerfeld ( ) B) Wave equations
25. Rutherford ( ) C) Principal quantum number
26. Lande ( ) D) Planetary model
27. Uhlenbeck ( ) E) Spin quantum number
F) Azimuthal quantum number

Answers: 1-C; 2-D; 3-B; 4-A; 5-C. 6-C; 7-A; 8-B; 9-D; 10-C; 11-D; 12-C. 13) Atomic radius 14) Na (Sodium) 15) 12 16) 3s1 17) 2p 18) Alpha 19) Max Planck 20) (n-1) 21) Dumb bell 22) 4p 23-C; 24-F; 25-D; 26-A; 27-E.

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