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Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal. Magnesium does not react with cold water. Ht reacts with hot water to form magnesium hydroxide and hydrogen. Ht also starts floating due to the bubbles of hydrogen gas sticking to its surface. Metals like aluminium, iron and zinc do not react either with cold or hot water. But they react with steam to form the metal oxide and hydrogen.1. Why does calcium floats?a. Due to hydrogen gasb. Due to magnesium2. Do Magnesium reacts with cold water?a. YESb. NO3. Metals which do not react in cold water react with ?a. Steamb. Hot water4. State true or false : Hydrogen gas Bubbles sticks to the surface of metalsa. TRUEb. FALSE5. Iron reacts with cold water.a. YESb. NO |
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Answer» 1. a. Due to hydrogen gas 2. b. NO 3. a. Steam 4. b. FALSE 5. b. NO |
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