Question

Q. 3. State True/ False:
1. Generally, non-metals react with acids, F
2. Copper displaces zinc from zinc sulphate solution. F
3. CNG is more polluting fuel than petrol.
4. If the amplitude of vibration is large, sound is feeble.
5. The lower the frequency of vibration, the higher is the pitch.​

Answer 1

3. false

4. true

5. false