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Question

Valency of hydrogen is 1 and that of sulphur is 2. What should be the formula of hydrogen sulphide?



A

HS2

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B

H2S2

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C

HS

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D

H2S

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Solution

The correct option is B

HS


While writing the chemical formula for hydrogen sulphide, first write the constituent elements and their valencies, after this cross over the valencies of combining atoms.

Symbol:       H      S

Charges:     +1    -2

Formula:    H2S    


Chemistry

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