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Q.

Valence electrons in the element A are 3 and that in element B are 6. Most probable compound formed from A and B is

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a

A2B

b

A2B3

c

A6B3

d

AB2

answer is D.

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Detailed Solution

Valence electrons in A = 3
Valence electrons in B = 6
Thus, A is electropositive and B is electronegative, A can lose three electrons and B can gain two electrons to attain stable configuration.
Thus, A exists as ,A3+ and B as B2-
Thus, compound is A2B3.
 

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