Class 10 Science Chapter 3 Metals And Non Metals Quiz 17 (12 MCQs)

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1. Zinc + hydrochloric acid ..... >
2. Generally, non-metals are not conductors of electricity. Which of the following is a good conductor ofelectricity?
3. An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C
4. The colour of PbO$_{2}$ is
5. Which of the following pair of metals exist in their native state in nature?
6. Which of the following pairs will give displacement reactions?
7. Name the non metal which is liquid
8. Which of the following is the best malleable metal?
9. Which of the following non-metal is lustrous?
10. Which is the hardest substance known?
11. What temperature does mercury melt at?
12. Complete the equation:Potassium + Nitric Acid $\rightarrow$