Free MCQs & Online Quiz Practice for Exams

Q: The electronic configuration of gallium (Z = 31) is: (Entry test 2011)

A) [Ar] 3d¹⁰4s²4p¹

B) [Ar] 3d⁵4s²4p¹

C) [Kr] 3d³4s²4p

D) [Kr] 4d³4s²4p¹

Q: Mosley demonstrated a direct relationship between the frequency of X-rays emitted by an element and: (Entry test 2011)

A) Atomic number

B) Atomic mass

C) Degree of ionization

D) Electronic configuration

Q: The wave nature of an electron is illustrated by its: (Entry test 2011)

A) Photoelectric effect

B) Compton effect

C) Penetrating effect

D) Diffraction

Q: If an atom exists in the excited state n = 5, the maximum number of transitions possible is: (Entry test 2012)

A) 6

B) 5

C) 4

D) 3

Q: Which of the following rays has the longest wavelength? (Entry test 2012)

A) Infrared rays

B) Ultraviolet rays

C) Gamma rays

D) X-rays

Q: The total energy of a hydrogen atom in its ground state is: (Entry test 2012)

A) Zero

B) Positive

C) Negative

D) None

Q: The part of the electromagnetic spectrum in which Lyman series lies is: (Entry test 2012)

A) Visible region

B) Infrared region

C) Ultraviolet region

D) X-rays

Q: The atomic number of scandium is 21. What is its ground state electronic configuration? (Entry test 2012)

A) 1s²2s²2p⁶3s²3p⁶3d¹4s²

B) 1s²2s²2p⁶3s²3p⁴3d⁴

C) 1s²2s²2p⁶3s²3p⁶3d²4s¹

D) 1s²2s²2p⁶3s²3p³4s²

Q: Which of the following elements with given electronic configuration has the highest ionization potential? (Entry test 2013)

A) 1s²2s²2p³

B) 1s²2s²2p⁶3s²

C) 1s²2s²2p⁶3p³

D) 1s²2s²2p⁵

Q: The correct electronic configuration of nickel (Z = 28) is: (Entry test 2013)

A) [Ar] 3d⁸4s²

B) [Ar] 3d⁹4s¹

C) [Ar] 3d¹⁰4s⁰

D) [Ar] 3d⁷4s³

Q: Which of the following lists contains three regions of the electromagnetic spectrum in order of increasing energy? (Entry test 2013)

A) Gamma rays, UV rays, radio waves

B) Gamma rays, visible rays, UV rays

C) Microwaves, UV rays, X-rays

D) Radio waves, visible rays, infrared rays

Q: How many different values can mₗ assume in the electron subshell designated by quantum numbers n = 5, l = 4? (Entry test 2013)

A) 4

B) 5

C) 6

D) 9

Q: Which is incorrect about ionization energy? (Entry test 2014)

A) Depends upon nuclear charge

B) Depends upon atomic radius

C) Depends upon shielding effect

D) Does not depend upon penetration effect

Q: Rutherford’s scattering experiment demonstrates: (Entry test 2014)

A) Existence of X-rays

B) Existence of α-particles

C) Mass to charge ratio of electron

D) Nuclear model of the atom

Q: The growth and reproduction of a eukaryotic cell is dependent upon its: (Entry test 2005)

A) Cytoplasm

B) Nucleus

C) Vacuoles

D) Nuclear pores

Q: Its membranes are the site where sunlight energy is trapped and where food is formed refers to: (Entry test 2005)

A) Chloroplast

B) Leucoplast

C) Chromoplast

D) Cytosol

Q: The rough endoplasmic reticulum is involved in the synthesis of: (Entry test 2005)

A) Protein

B) Carbohydrate

C) Phospholipids

D) Terpenoids

Q: In the following pair, one organelle is involved in the formation of the other except: (Entry test 2007)

A) Golgi bodies–lysosomes

B) Nucleus–ribosomes

C) Endoplasmic reticulum–peroxisomes

D) E.R.–Golgi bodies

Q: Which one of the following is found in plant cell only? (Entry test 2007)

A) Peroxisomes

B) Lysosomes

C) Glyoxisomes

D) Ribosomes

Q: A cell fails to detoxify the waste substances produced in it because it does not possess enough: (Entry test 2007)

A) Lysosomes

B) Ribosomes

C) Rough E.R.

D) Smooth E.R.