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Question

Which of the following reaction equations is/are properly balanced?
i. Cl2+2NaBrBr2+2NaCl
ii. 2Na+O2Na2O
iii. 2K+2H2OH2+2KOH

A
i only
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B
ii only
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C
iii only
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D
i and iii only
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E
i, ii and iii
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Solution

The correct option is C i and iii only
Equation i.) It is a balanced equation. No. of atoms of Cl2 ,Na and Br2 are same(2 atoms) in both sides.
Equation ii.) Oxygen atoms are not balanced. LHS has 2 atoms but RHS has only 1 oxygen atom
Equation iii) It is a balanced equation. No. of atoms of potassium, Hydrogen and oxygen are same in both sides.

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