Mercury is a :
1). solid metal
2). liquid metal
3). solid nonmetal
4). liquid nonmetal
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1. The important metal used with iron to produce stainless steel is
2. The important ore of aluminium is
3. The pair of compounds used as anaesthetic in medicines :
4. The natural resource known as black gold is
5. Question 7.10:Why does R3P=O exist but R3N=O does not (R = alkyl group)?
6. Which one is not a pure form of carbon?
7. Which of the following is used as filler in tyre of rubber ?
8. A balloon filled with helium rises in air because
9. The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :