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A greenish yellow gas reacts with an alkali metal hydroxide to form a halite which can be used in fireworks and safety matches.

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A greenish yellow gas reacts with an alkali metal hydroxide to form a halite which can be used in fireworks and safety matches. The gas and halite respectively are    

1. Br2 , KBrO3   

2. Cl2 , KClO3   

3. I2 , NaIO3   

4. Cl2 , NaClO3

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1 Answer

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Best answer

Correct option: 2 Cl2 , KClO3

Explanation:

3Cl2 + 6KOH → 5KCl + KClO3 + 3H2O

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