SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A metal hydroxide and carbon dioxide are formed
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A metal hydroxide and hydrogen are formed
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A metal hydroxide and oxygen are formed
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None of the above
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Detailed explanation-1: -Alkali metal (M, group 1) react with water to form aqueous alkali metal hydroxide (MOH) and hydrogen gas as shown by the equation below: 2M(s)+2H2O→2MOH(aq)+H2(g)
Detailed explanation-2: -All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group. This shows that the reactivity of the alkali metals increases as you go down Group 1.
Detailed explanation-3: -Alkali metals react with water to produce heat, hydrogen gas, and the corresponding metal hydroxide. The heat produced by this reaction may ignite the hydrogen or the metal itself, resulting in a fire or an explosion.
Detailed explanation-4: -Metals react with water to form metal hydroxide and hydrogen gas, but when metals react with steam, they form metal oxide and hydrogen. It depends totally on the reactivity of the metals whether they will react with cold water, hot water, steam or will not react at all.
Detailed explanation-5: -Alkali metal (M, group 1) react with water to form an aqueous alkali metal hydroxide (MOH) and hydrogen gas as shown by the general equation below: 2M(s)+2H2O→2MOH(aq)+H2(g)