2nd Year Physics Chapter 12 Test26. Nature of Science: A Debate

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which one of the following is an amphoteric oxide?
   1. ZnO
   2. Na₂O
   3. SO₂
   4. B₂O₃
2. Colourless fuming liquid chloride is:
   1. AlCl₃
   2. SiCl₄
   3. S₂Cl₂
   4. PCl₃
3. The highest oxide of chlorine is:
   1. Cl₂O
   2. ClO₂
   3. HOCl
   4. Cl₂O₇
4. Pythagoras’ Theorem states:
   1. a² + b² = c²
   2. a² – b² = c²
   3. ab = c²
   4. a² + c² = b²
5. Blue flame colour is produced by:
   1. Ca
   2. Cs
   3. Na
   4. Sr
6. What did Newton use to explain his orbital motion experiment?
   1. Rocket
   2. Cannonball
   3. Stone
   4. Satellite
7. Euler’s number (e) is approximately:
   1. 2.1415
   2. 2.71828
   3. 3.1416
   4. 1.618
8. What is the formula for centripetal acceleration?
   1. a = v²/r
   2. a = ½gt²
   3. a = vt
   4. a = F/m
9. The reaction of Mg and Al with water is relatively slow because of:
   1. Exothermic reaction
   2. Metal oxide layer formation
   3. Endothermic reaction
   4. Amphoteric nature
10. Carbon forms C₂²⁻ ions in:
    1. CH₄
    2. Al₄C₃
    3. CaC₂
    4. NaCH₃