Most important MCQs of Chemistry

By: Prof. Dr. Fazal Rehman | Last updated: May 29, 2025

1. : Fixed volume is a characteristic of…
(A) gases
(B) liquids
(C) solids
(D) Both B and C

2. : Raffinose is an example of…
(A) Monosaccharides
(B) Trisaccharides
(C) Disaccharides
(D) Polysaccharides

3. : All radicals have a valency of 2, except…
(A) NH₄
(B) SO₄
(C) CO₃
(D) MgCO₃

4. : Anemia, bleeding gums, and tongue inflammation are caused by the deficiency of…
(A) Calcium
(B) Vitamin C
(C) Vitamin D
(D) Vitamin B

5. : A suitable constant flow of electricity can be ensured through…
(A) a rheostat
(B) an ammeter
(C) a voltmeter
(D) a galvanometer

6. : What is caused due to extreme lack of proteins?
(A) Malaria
(B) Kwashiorkor
(C) HIV Aids
(D) None of these

7. : Which of the following cannot conduct electricity?
(A) can conduct electricity
(B) have metallic bonds
(C) is an oxide
(D) cannot conduct electricity

8. : Two fatty acids that are components of fats are…
(A) Stearic acid and Oleic acid
(B) Palmitic acid and Oleic acid
(C) Butyric acid and Caproic acid
(D) None of these

9. : Presence of impurities causes…
(A) a fall in condensation point
(B) a rise in boiling point
(C) a fall in boiling point
(D) Both B and C

10. : The existence of RNA is in the form of…
(A) Double strand
(B) Single strand
(C) Triple strand
(D) Multiple strands