JEE Advanced Chemistry question

Which of the following statements are correct for all three halogens (X), Cl, Br and I?

(A)They all need to gain one electron to acquire stable configuration
(B)They all form strong acid of the type HX
(C)Both (a) and (b) are correctCorrect
(D)None of the above is correct

Answer: (C)

Solution

Cl, Br and I each have seven valence electrons and need to gain just one electron to complete a stable noble-gas-like octet, confirming (a). Each also forms a hydrogen halide, HCl, HBr and HI, that is a strong acid

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Question ID VK-159395