Bsc Entrance Examination Important Questions 2023-24
1. Which is independent of temperature ?
A.- Molarity
B.- Weight volume percent
C.- Normality
D.- Molality
2. Which is the last element of the periodic table?
A.- Og
B.- Bi
C.- Er
D-. Lu
3. The atomic size on going from sodium to chloride is
A.- Decreases
B.- Remains same
C.- First increase and then Decrease
D.- Increase
4. What are the element of the 16 th group of the periodic table called?
A.- Halogen
B.- Lead
C.- Chalcogen
D.- Inert Gas
5. Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of…
A. Sodium Ammonia Complex
B. Sodium ion-Ammonia Complex
C. Sodamide
D. Ammoniated Electrons
BSC Entrance Examination
6. Electronic configuration of calcium(s-block) atom may be written as
A.- [Ne]4p2
B.- [Ne] 4s2
C.- [Ar] 4s2
D.- (Ar) 4p2
7. Where are lanthanoid and actinoid elements founds ?
A. S-block
B. d-block
C. p-block
D. f-block
8. Which of the following is not alkali metal ?
A.- Na
B.- Fr
C.- Ca
D.- K
9. In the long form of the periodic table all the non-metals are placed in
A. S-block
B. P-block
C. F-block
D. D-block
10. The de Broglie wavelength associated with electron in the first Bohr Orbit will be
A.- 3.32×10 -⁹m
B.- 3.33×10 -¹⁰m
C.- 3.32×10 -¹² m
D.- 3.32×10 -¹⁵ m
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11. The energy of a photone associated with light of wave-light 200 Hm is (esu h =6.63×10-³⁴ Js)
A.-13.26×10-³² J
B.- 13.26×0-⁴¹ J
C.- 9.94 x10-²⁸ J
D.-09.94×10-¹⁹ J
12. Function in Schrodinger equation has significance that it represents
A. amplitude of electron wave
B.probability of finding an electron
C. energy of the electron
D. frequency of the electron
13. Neutron/Proton (n/p) ratio for stable elements is approximately
A. One
B. Three
C. Twenty
D. less than 0.1
14.Which one of the followings statements regarding radial probability distribution curve isfalse ?
A. n=2, l=0, node = 1
B. n=3, l=0, node2
C. n=2, I=0, node=0
D n=3, l=0, node=1
15. The correct order of hydration enthalpies of alkali ions is:
A. Li+ > Na+ >K+ > Cs+ > Rb+
B. Li >Na+< K+< Rb+> Cs+
C. Li+< Na+ > K+ > Rb+> Cs+
D. Li+> Na+>K+> Rb+> Cs+
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16. how many elements are in the 6th period ?
A.- 2
B.- 32
C.- 26
D.- 8
17. The horizontal row of the periodic table is called…?
A.- Period
B.- Lanthanid
C.- Actinide
D.- Group
18. de Broglie’s equation for wavelength λ associated with a particle of mass m is
A. λ =mh/v
B. λ=mv/h
C. λ =/mv
D. λ=m.hv
19. Which one of the followings is most metallic ?
A.- Na
B.- Rb
C.- K
D.- Cs
20. Radius of the Bohr’s orbit is given by
A. r = nh/ 4π²me⁴
B. r² = n²h² / 4π²me²
C. r = n²h² / 4π²me²
D.r = nh / 4π me
21. Which spectral series is found in visible spectrum region.
A.- Brackett
B.- Paschen
C.- Pfund
D.- Balmer
22. Which of the following inert gas has the electronic configuration in chloride lon ?
A.- Ne
B.- He
C.- Kr
D.- Ar
23. Which of the following has lowest meltine point ?
A.- Cs
B.- Na
C.- Li
D.- K
24. The orbital angular momentum of 2s orbital electron is?
A. +1/2.h/2π
B. 0
C. h/2π
D. √2.h/2π
25. What is the correct order of atomic radii Increase –
A. Ca²+ < Ar < K+
B. Ca²+ < K+ < Ar
C. K+ < Ar < Ca²+
D. Ar < K+ < Ca²+
26. The pair of element that have similar (Diagonal Relation) chemical properties are:
A.- Beryllium and boron
B.- Lithium and magnesium
C.- Carbon and nitrogen
D.- Aluminium and magnesium
27. Consider the isoelectronic species, Na+, Mg²+, F – and O² The correct order of increasing length of their radiis
A. F< O² < Mg²+ < Na+
B.Mg²+ < Na+ < F – < O²-
C. O²- < F – < Na+ < Mg²+
D. O²- < F- < Mg²+ < Na+
Bsc Entrance Examination 2023
Answer. – 1.-D, 2- A, 3-A, 4- C,5- D, 6 – D , 7- B, 8 – C, 9-B, 10 – B,11 – D, 12 – B,13 – A, 14 – D, 15 – D, 16-B, 17 – A, 18 – C, 19 – D, 20 – C, 21 – D, 22- C,23- A, 24- B, 25 – B, 26 – B,27 – B.
Bsc Entrance Examination 2023-24 questions and answers,
Bsc Entrance Examination 2023-24 question with answer
Bsc Entrance Examination quiz 2023-24