Q281
Open questionBauxite is the ore of
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Chemistry GK · all questionsMetal and Its Compounds
Metal and Its Compounds
practice.
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Q282
Open questionThe quartz used in watches is . . . . . . . .
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Q283
Open questionConsider the following statements
1. Galvanisation is the method of protecting steel and iron fromrusting by coating them with a thin layer of zinc.
2. Pure iron is very soft but if it is mixed with a small amount of carbon, it becomes hard and strong.
3. When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.
Which of the statements given above are correct?
1. Galvanisation is the method of protecting steel and iron fromrusting by coating them with a thin layer of zinc.
2. Pure iron is very soft but if it is mixed with a small amount of carbon, it becomes hard and strong.
3. When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.
Which of the statements given above are correct?
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Q284
Open questionThe milkman adds a little bit of baking soda to the fresh milk:
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Q285
Open questionWhat is the dominant chemical present in detergent powder?
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Q286
Open questionWhat would be the molecular formula of calcium phosphate?
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Q287
Open questionHeaviest metal of the following is made of
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Q288
Open questionWhich of these chemicals is not soluble in water?
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Q289
Open questionWhich of the following is the symbol of the metal that occurs in liquid form at ordinary temperature?
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Q290
Open questionWhat is the product formed when sodium bicarbonate is heated strongly?
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Q291
Open questionWhy is stainless steel stainless?
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Q292
Open questionWhich one of the following elements is never found in nature as a free element?
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Q293
Open questionThe heaviest natural element is
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Q294
Open questionWhen lead metal reacts with a copper chloride solution,
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Q295
Open questionWhat is the ore of aluminium called?
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Q296
Open questionThe metal, which is kept in the air for some time, is coated with a layer of green basic carbonate, which is:
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Q297
Open question. . . . . . . . metal does not decay.
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Q298
Open questionThe process of adding a thin layer of zinc to iron or steel is called:
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Q299
Open questionDuring lime spraying, Ca (OH)2 reacts slowly with CO2 in the air so that the walls to form a thin layer of
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Q300
Open questionWhich one of the following oxides dissolves in water?
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