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Which of these elements have almost same...

Which of these elements have almost same electronegativity?
(i) C,I (ii) P, H (iii) N, Cl (iv) Br,S

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The correct Answer is:
Phosphorous and hydrogen have almost similar electronegativity values of 2.1. Similarly carbon and iodine have a value of 2.5; Nitrogen and Chlorine have a value of 3.0 and Bromine, Sulphur have a value of 2.8.
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