When ethyl alcohol is distilled with bleaching powder and water, chloroform is obtained. The number of moles of bleaching powder needed in the preparation of one mole of chloroform is:
A
10
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B
5
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C
4
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D
2
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Solution
The correct option is A 4
Ethyl alcohol is distilled with bleaching powder and water.
1.CaOCl2+H2O⟶Ca(OH)2+Cl2[Cl2+H2O⟶2HCl+O]
2.CH3CH2OH+[O]⟶CH3CHO+Cl2
3.CH3CHO+3Cl2⟶CCl3CHO+3HCl
Cl2 acts both as an oxidizing agent and chlorinating agent CCl3CHO+Ca(OH)2⟶2CHCl2+(HCOO)2+Ca
3 moles for chlorination and one for oxidizing agent.