Chemistry-Objective Related Question Answers
401. The gas which causes the fading of the colour of Taj Mahal is?
Sulphur dioxide
402. Number of atoms present in sulphur molecule?
8
403. Acid rain is caused by?
Sulphur dioxide
404. The process of purifying Sulphide ores?
Froth Flotation process
405. The process of heating the rubber by adding sulphur?
Vulcanization
406. Mixture of Sulphur and Charcoal is known as?
Gun Powder
407. Potassium is kept in?
Kerosene
408. The elements which are known as soft metals?
Pottassium & Sodium
409. Pottassium & Sodium discovered by?
Humphry Davy
410. The most abundant metal present in blood?
Potassium
411. The metal present in bath soap?
Potassium
412. The compound of potassium used for purifying water?
Potassium Permanganate
413. The ores of potassium are?
Carnalite & Salt Petre
414. Metal related to the disease arthritis?
Potassium
415. First metal separated by electrolysis?
Potassium
416. Chemical used for organic farming; neutralizing acidic soil?
Potassium Bicarbonate
417. The most abundant metal in human body is?
Calcium
418. The compound of calcium used to make bandage & statues is?
Plaster of Paris
419. Composition of coral reefs is caused by?
Calcium carbonate
420. The compound used in tooth paste as polishing agent?
Calcium carbonate
421. The most abundant chemical substance in cement?
Calcium oxide
422. Compound which is regulating the setting time of cement?
Gypsum
423. The product obtained after heating. the gypsum at 125°C?
Plaster of Paris
424. Compound which is used in the process of manufacturing cement?
Limestone
425. The product obtained when lime stone is heated?
Quicklime and Carbondioxide
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