CONCEPT OF CHEMISTRY MCQs 10 min Score: 0 Attempted: 0/10 Subscribe 1. Which philosophers used the word ‘atom’? (A) Greeks (B) Latin (C) Indian (D) French 2. Example of an element is: (A) Salt (B) Water (C) Carbon (D) Glucose 3. Number of natural elements are: (A) 120 (B) 125 (C) 118 (D) 111 4. Number of artificial / manmade elements are: (A) 26 (B) 28 (C) 20 (D) 30 5. Symbol of Barium is: (A) B (B) none of these (C) Be (D) Ba 6. Valency of Zinc is: (A) 4 (B) 2 (C) 3 (D) 5 7. Empirical formula of Benzene is: (A) C₂H₂ (B) C₃H₃ (C) CH (D) none 8. Avogadro’s number is represented as: (A) Ma (B) CH (C) Ba (D) Na 9. Proton number is also called: (A) Valency (B) None (C) Mass number (D) Atomic number 10. 1 amu is equal to: (A) none (B) 16.6 × 10²⁷ Kg (C) 1.66 × 10²⁷ g (D) 1.66 × 10⁻²⁷ g
