1. CuSO4.5H2O is the chemical formula of-
- Caustic soda.
- Washing soda.
- Blue vitriol.
- Ammonium Sulphate.
Answer with Explanation
Answer: Option C
Explanation: No explanation for this question.
2. Bleaching powder is produced from-
- Calcium and Oxygen.
- Sodium, Hydrogen and Oxygen.
- Calcium, Oxygen and Chlorine.
- None of these.
Answer with Explanation
Answer: Option C
Explanation: No explanation for this question.
3. Which is not a rare gas?
- Helium.
- Argon.
- Neon.
- Radon.
Answer with Explanation
Answer: Option D
Explanation: No explanation for this question.
4. Which is the allotrope of carbon?
- Diamond.
- Gold.
- Silver.
- Copper.
Answer with Explanation
Answer: Option A
Explanation: No explanation for this question.
5. In Leclanche cell-
- Electric energy is converted into chemical energy.
- Chemical energy is converted into electric energy.
- Heat energy is converted into electric energy.
- None of these.
Answer with Explanation
Answer: Option B
Explanation: No explanation for this question.
6. The wire used in a fuse has-
- Low resistance.
- Low resistance and High melting point.
- High resistance and Low melting point.
- None of these.
Answer with Explanation
Answer: Option C
Explanation: No explanation for this question.
7. Malachite is an ore of-
- Iron.
- Copper.
- Silver.
- None of these.
Answer with Explanation
Answer: Option B
Explanation: No explanation for this question.
8. When candle burns the produced gasous products are-
- Carbon dioxide and Water vapour.
- Oxygen and Water vapour.
- Oxygen and Carbon dioxide.
- None of these.
Answer with Explanation
Answer: Option A
Explanation: No explanation for this question.
9. Amalgam is a mixture of metal with-
- Mercury.
- Gold.
- Iron.
- None of these.
Answer with Explanation
Answer: Option A
Explanation: No explanation for this question.
10. The lightest and simplest atom is-
- Oxygen.
- Hydrogen.
- Nitrogen.
- Carbon dioxide.
Answer with Explanation
Answer: Option B
Explanation: No explanation for this question.
11. Select the element which is liquid but a metal?
- Mercury.
- Copper.
- Iron.
- Silver.
Answer with Explanation
Answer: Option A
Explanation: No explanation for this question.
