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Question

Which among the given conditions are represented in the following chemical equation?
2H2 (g) + O2 (g) 2H2O (g)
A. Physical state of the reactants
B. Physical state of the products
C. Energy transfer

A
Only A
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B
Only B
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C
Both A and B
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D
Only C
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Solution

The correct option is C Both A and B
A chemical equation can convey the physical state of reactants and products, reaction conditions and the energy transfer in a chemical reaction using appropriate symbols or abbreviations.

In the given reaction
2H2 (g) + O2 (g) 2H2O (g)
Only the physical states of the reactants and products are represented using the symbol (g). Energy transfer is not represented. Hence, A and B conditions are correct, ie. option C.

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