Chemistry - Single MCQs (Page 45)

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Q441. Which of the following is the lightest metal ?...Q442. Which of the following is the main ingredient of cement?...Q443. Nylon is prepared from?...Q444. Phosphorus is mainly extracted from?...Q445. The oil used in the froth floatation process is?...Q446. The material that can be deformed permanently by heat and pressure is called a?...Q447. Mass number of a nucleus is?...Q448. Due to rusting the weight of iron?...Q449. When water is added to anhydrous white copper sulphate, the color will change to...Q450. Heavy metal pollution of water is caused by?...