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Question

Which of the following are examples of combination reaction?

(i) CaO+O22CaCO3

(ii) CaCO3CaO+CO2

(iii) MgO+CO2MgCO3

(iv) Fe+SFeS

(v) 2AgCl+sunlight2Ag+Cl2

(vi) CH4+2O2CO2+2H2O

(vii) Na2O+H2O2NaOH


A

(ii), (vii), (iv), (vi)

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B

(i), (ii), (v), (vii)

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C

(ii), (iii), (iv), (vi)

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D

(i), (iii), (iv), (vii)

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Solution

The correct option is D

(i), (iii), (iv), (vii)


The equations given below are examples of combination reaction.

CaO+O22CaCO3

MgO+CO2MgCO3

Fe+SFeS

Na2O+H2O2NaOH

The equations(CaCO3CaO+CO2, 2AgCl+sunlight2Ag+Cl2, Na2O+H2O2NaOH) are not Combination reactions because, in these cases, more than one product are formed.


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