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

Choose the best answer:

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

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

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

2. Change the following statements into chemical equations.

Hydrogen combine the chlorine to form hydrogen chloride.

\(H_2\) + \(Cl_2\) → \(2HCl\)
\(H_2\) + \(Cl\) → \(2HCl\)
\(H_3\) + \(Cl_2\) → \(2HCl\)
\(H_2\) + \(Cl_2\) → \(HCl\)

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1. Chemical reactions and equations

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