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Question
A metal ribbon 'X' bums in oxygen with a dazzling white flame forming a white ash 'Y'. The correct description of X, Y and the type of reaction is:
Options
X = Ca; Y = CaO;
Type of reaction = Decomposition
X = Mg; Y = MgO;
Type of reaction = Combination
X = Al; Y = Al2O3;
Type of reaction = Thermal decomposition
X = Zn; Y = ZnO;
Type of reaction = Endothermic
Solution
X = Mg; Y = MgO;
Type of reaction = Combination
Explanation:
In this reaction, magnesium and oxygen combine to create magnesium oxide.
\[\ce{2Mg + O_2 ->2MgO}\]
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