Statement 1: Atom $A$ with 7 valence electrons forms $A B$ , with atom $B$ with two valence electrons.
Statement 2: $B$ donates its electrons to fill the outer shell of $A$ .

Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

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Both the Statement 1 and Statement 2 are correct, but Statement 2 is not the correct explanation of Statement 1.

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Statement 1 is correct, but Statement 2 is not correct.

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Statement 1 is not correct, but Statement 2 is correct.

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Solution

The correct option is C Statement 1 is not correct, but Statement 2 is correct.
$A$ with 7 valence electrons means valency $= 1$
$B$ with 2 valence electrons means valency $= 2$
So compound formed should be $A_{2} B$
$B$ can donate its two electrons to the outermost shell of $2 A$ atoms in order to fulfil their configuration.

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Statement 1: Atom A with 7 valence electrons forms AB, with atom B with two valence electrons.Statement 2: B donates its electrons to fill the outer shell of A.

Statement 1: Atom $A$ with 7 valence electrons forms $A B$ , with atom $B$ with two valence electrons.
Statement 2: $B$ donates its electrons to fill the outer shell of $A$ .