🔥🔥 Chemistry multiple choice questions and answers
1. What aspect of the modern view of atomic structure was proved by Rutherford's gold foil experiment?
(A) the existence of the nucleus
(B) the charge on an electron
(C) the charge on alpha particle
(D) the existence of electrons
Answer A
2. Which of the following particle was discovered by cathode ray experiment?
(A) neutron
(B) proton
(C) electron
(D) nucleus
Answer C
3. The maximum number of electrons that can be accommodated in a sublevel for which l = 3 is:
(A) 2
(B) 10
(C) 6
(D) 14
Answer D
4. The Heisenberg Principle states that____
(A) no two electrons in the same atom can have the same set of four quantum numbers.
(B) two atoms of the same element must have the same number of protons.
(C) it is impossible to determine accurately both the position and momentum of an electron simultaneously.
(D) electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set.
Answer C
5. The neutral atoms of all of the isotopes of the same element have
(A) different numbers of protons.
(B) equal numbers of neutrons.
(C) the same number of electrons.
(D) the same mass numbers.
Answer C
6. In the Lewis structure for the OF2 molecule, the number of lone pairs of electrons around the central oxygen atom is
(A) 0
(B) 1
(C) 2
(D) 3
Answer C
7. Which is classified as nonpolar covalent?
(A) the H-I bond in HI
(B) the H-S bond in H2S
(C) the P-Cl bond in PCl3
(D) the N-Cl bond in NCl3
Answer D
8. The valence electrons of representative elements are
(A) in s orbitals only.
(B) located in the outermost occupied major energy level.
(C) located closest to the nucleus.
(D) located in d orbitals.
Answer B
9. What is the total number of electrons in the correct Lewis dot formula of the sulfite ion(SO₃²⁻)?
(A) 8
(B) 24
(C) 26
(D) 30
Answer C
10. Which one of the compounds below is most likely to be ionic?
(a) GaAs
(b) CaCl2
(c) NO2
(d) CCl4
Answer B
Take our fun and engaging quizzes!
1. What aspect of the modern view of atomic structure was proved by Rutherford's gold foil experiment?
(A) the existence of the nucleus
(B) the charge on an electron
(C) the charge on alpha particle
(D) the existence of electrons
Answer A
2. Which of the following particle was discovered by cathode ray experiment?
(A) neutron
(B) proton
(C) electron
(D) nucleus
Answer C
3. The maximum number of electrons that can be accommodated in a sublevel for which l = 3 is:
(A) 2
(B) 10
(C) 6
(D) 14
Answer D
4. The Heisenberg Principle states that____
(A) no two electrons in the same atom can have the same set of four quantum numbers.
(B) two atoms of the same element must have the same number of protons.
(C) it is impossible to determine accurately both the position and momentum of an electron simultaneously.
(D) electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set.
Answer C
5. The neutral atoms of all of the isotopes of the same element have
(A) different numbers of protons.
(B) equal numbers of neutrons.
(C) the same number of electrons.
(D) the same mass numbers.
Answer C
6. In the Lewis structure for the OF2 molecule, the number of lone pairs of electrons around the central oxygen atom is
(A) 0
(B) 1
(C) 2
(D) 3
Answer C
7. Which is classified as nonpolar covalent?
(A) the H-I bond in HI
(B) the H-S bond in H2S
(C) the P-Cl bond in PCl3
(D) the N-Cl bond in NCl3
Answer D
8. The valence electrons of representative elements are
(A) in s orbitals only.
(B) located in the outermost occupied major energy level.
(C) located closest to the nucleus.
(D) located in d orbitals.
Answer B
9. What is the total number of electrons in the correct Lewis dot formula of the sulfite ion(SO₃²⁻)?
(A) 8
(B) 24
(C) 26
(D) 30
Answer C
10. Which one of the compounds below is most likely to be ionic?
(a) GaAs
(b) CaCl2
(c) NO2
(d) CCl4
Answer B
Take our fun and engaging quizzes!