(A) Diffusion
(B) Evaporation
(C) Effusion
(D) Boiling
Answer: (C) Effusion
Category: Chemistry MCQs Class 9
Chemistry solved multiple choice questions (MCQs) for class 9 with answers.
The bond formed between atoms due to transfer of electrons from one atom to another is called:
(A) Ionic bond
(B) Covalent bond
(C) Co-ordinate covalent bond
(D) Hydrogen bond
Answer: (A) Ionic bond
Which of the following is the Empirical formula of Benzene?
(A) CH2
(B) CH
(C) C6H6
(D) B2O3
Answer: (B) CH
Which of the following oxides is utilized in breathing equipments to provide oxygen to patients?
(A) Potassium peroxide K2O2
(B) Potassium oxide K2O
(C) Sodium Peroxide Na2O2
(D) Potassium super oxide KO2
Answer: (D) Potassium super oxide KO2
The oxidation number of Cr in Cr2 O3 and K2 Cr2 O7 are:
(A) +4 and +7
(B) +6 and +2
(C) +2 and +2
(D) +3 and +6
Answer: (D) +3 and +6