(A) Charles’s law
(B) Avogadro’s law
(C) Boyle’s law
(D) Law of diffusion
Answer: (A) Charles’s law
Category: Chemistry MCQs Class 9
Chemistry solved multiple choice questions (MCQs) for class 9 with answers.
The melting point and boiling point of water are higher due to:
(A) Its covalent nature
(B) Hydrogen bonding
(C) Its higher molecular mass
(D) Its higher density
Answer: (B) Hydrogen bonding
The bond which is formed by complete transfer of electrons from one atom to another is called?
(A) Covalent bond
(B) Hydrogen bond
(C) Co-ordinate bond
(D) Ionic bond
Answer: (D) Ionic bond
If you move from left to right in a period of periodic table, which of the following will NOT change?
(A) Atomic radius
(B) Atomic mass
(C) Shielding effect
(D) Nuclear charge
Answer: (C) Shielding effect
The correct electronic configuration of Mg is:
Answer: (B) 1s2, 2s2, 2p6, 3s2