Arrange the following compounds in terms of increasing polarity: HCN,NaCl,Cl2
A
NaCl<HCN<Cl2
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B
NaCl<Cl2<HCN
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C
HCN<Cl2<NaCl
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D
Cl2<HCN<NaCl
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Solution
The correct option is DCl2<HCN<NaCl Cl2 has the same atoms bonded, hence the polarity is 0, whereas, the H-CN bond is notpolar due to the difference in the electronegativity of the H and CN groups or atoms.
NaCl has very high electronegative difference, as Na is metal and Cl is non-metal. Hence order is as follows :