Chemical reactions and equations — task. Science CBSE Homework Assignments, Class 10.

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1. Write a balanced chemical equation using state symbols for the following reaction.

Solid magnesium and oxygen gas react to give solid magnesium oxide.

\(Mg\)(s) + \(O_2\)(g) → \(MgO\)(l)
\(Mg\)(aq) + \(O_2\)(g) → \(MgO\)(s)
\(Mg\)(s) + \(O_2\)(g) → \(MgO\)(s)
\(Mg\)(s) + \(O_2\)(g) → \(MgO\)(aq)

2. Change the following statements into chemical equations.

Hydrogen sulphide gas burns in air to give water and sulphur dioxide

\(2HS\) + \(3O_2\) → \(2H_2O\) + \(2SO_2\)
\(2H_2S\) + \(3O_2\) → \(2H_2O\) + \(3SO_2\)
\(2H_2S\) + \(3O_2\) → \(2H_2O\) + \(2SO_5\)
\(2H_2S\) + \(3O_2\) → \(2H_2O\) + \(2SO_2\)

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1. Chemical reactions and equations

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