Chemistry - Single MCQs (Page 63)

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Q621. What is the main constituent of coal gas?...Q622. Which of the following is the source of common salt?...Q623. The gas that is responsible for global warming is ?...Q624. Which metal is commonly used for making an electromagnet?...Q625. Acetyl salicylic acid is commonly used as ?...Q626. Commercially, sodium bicarbonate is known as ?...Q627. Which metal remains in the liquid form under normal conditions?...Q628. Which one of the following is not a chemical change ?...Q629. Which one of the following non metals is not a poor conductor of electricity ?...Q630. Which o f the following is an alloy ?...