MCQS for Chemistry , O level

By: Prof. Dr. Fazal Rehman | Last updated: May 23, 2025

1. : Who is called the father of modern chemistry?
(A) Lavoisier
(B) Bill Gates
(C) Einstein
(D) C.V. Raman

2. : Most of the aquatic animals cannot survive above?
(A) 33 °C
(B) 35 °C
(C) 30 °C
(D) 65 °C

3. : Which is not a type of elements?
(A) Metals
(B) Gases
(C) Metalloids
(D) Non Metals

4. : Which one of the following disease is caused by mercury?
(A) Parkinson
(B) Cholera
(C) Aids
(D) Typhoid

5. : Which acid is present in lemon?
(A) Malic acid
(B) Tartaric acid
(C) Uric Acid
(D) Citric acid

6. : The blister copper is refined by?
(A) Electrolysis
(B) Freezing
(C) Boiling
(D) Reduction

7. : The chemical formula of Urea is?
(A) NH4HCL
(B) Na2HCHO3
(C) NH2COONH4
(D) NH2CONH2

8. : Rare gases are
(A) Tri atomic
(B) Di atomic
(C) Mono atomic
(D) None of above

9. : Sodium carbonate is commercially manufactured by?
(A) Ostwald’s Process
(B) Solvay Process
(C) Frisch Process
(D) Haber’s Process