SOME BASIC QUESTIONS OF - TopicsExpress

SOME BASIC QUESTIONS OF CHEMISTRY ******************************** 1. Global warming is increased due to production of Answer : Carbon dioxide 2. Which acid is present in lemon Answer : Citric acid 3.Brass is an alloy of copper and Answer : Zinc 4. The hardest natural substance known in the world is Answer : Diamond 5. Permanent hardness of water may be removed by the addition of Answer : Sodium carbonate (carbonates of Mg,Na-permanent ­hardness,bicarbonates of Mg,Na-temporary ­hardness) 6. Which is the most commonly used bleaching agent Answer : Chlorine 7. Which of the following gas is used in cigarette lighters Answer : Butane 8. Baking Soda is also known as Answer : Sodium bicarbonate 9. What is the main constituent of soap Answer : Sodium hydroxide 10. Name a fertilizer that contain maximum amount of Nitrogen Answer : Urea 11. Which compound is called oil of winter green Answer : Methyl Salicylate ********************************************************************************************************** WITH REGARDS Tech Edu Helpline

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