(A) Addition reaction
(B) Redox reaction
(C) Elimination reaction
(D) Substitution reaction
Answer: (B) Redox reaction
The reaction which involves both oxidation and reduction is known as redox reaction.
Category: Chemistry MCQs Class 11
Chemistry MCQs questions with answers of class 11 or first year. HSSC Part-I chemistry multiple choice questions from past papers.
The rate of reaction:
(A) Increases as the reaction proceeds
(B) Decreases as the reaction proceeds
(C) Remain the same as the reaction proceed
(D) May decreases or increases as the reaction proceed
Answer: (A) Increases as the reaction proceeds
The rate of reaction increases as the reaction proceeds.
Heat absorbed or released during a chemical process at constant pressure is equal to:
(A) E
(B) H
(C) Q
(D) W
Answer: (B) H
Heat absorbed or released during a chemical process at constant pressure is equal to H.
Which of the following molecules has two π (pi) bond?
(A) CH4
(B) C2H4
(C) N2
(D)O2
Answer: (C) N2
N2 molecule has two pi bonds.
No two electrons in an atom can have a same set of four quantum number is:
(A) Newton’s first law
(B) Hund’s Rule
(C) Pauli Exclusion Principle
(D) Aufbau rule
Answer: (C) Pauli Exclusion Principle
No two electrons in an atom can have a same set of four quantum number is Pauli Exclusion Principle.