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Question

What does the sign indicates in a chemical reaction. Also identify the type of reaction.

A
release of gas, displacement reaction
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B
dissolution of gas, decomposition reaction
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C
formation of a precipitate, precipitation reaction
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D
lowering of temperature, decomposition reaction
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Solution

The correct option is C formation of a precipitate, precipitation reaction
The sign indicates the formation of the precipitate and the type of reaction is precipitation reaction (type of double displacement reaction).

BaCl2(aq) + Na2SO4(aq) BaSO4 + 2NaCl(aq). In this reaction BaSO4 is a precipitate.

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