Question

The valency of W is 3. What is the formula of its chloride and oxide?
1 point
WCl, WO
W₃Cl , WO₃
WCl₃, W₂O₃
W₃Cl, W₂O₃​

Answer 1

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Valency of W is 3, maybe +3 or -3 with respect to the gain and loss of electrons. Taking only 3 will not affect the chemical formula:

Chloride:

Valency of W is 3 and the valency of chloride ion is -1. Crossing the valencies, then the chemical formula will be: WCl₃ (Refer to the attachment -1)

Oxide:

Valency of W is 3 and the valency of oxide ion is -2. Crossing the valencies, then the chemical formula will be: W₂O₃ (Refer to the attachment -1)

The option matching the chemical formulae is C

Answer 2

Explanation:

Answer:

The valency of element is 3 and formula of its chloride is $\sf \: XCL_3$

Explanation:

The neutral oxide of the element X$\sf \: X_2O_3$

is formed by the combination of$\sf \: X^{3+}$and$\sf \: O^{2-}$

. Thus the valency of the element is X as it has lost three electrons to acquire stable noble gas configuration.

Similarly oxygen has gained two electrons to attain stable noble gas configuration and thus has a valency of two.

The chloride of the element X is formed by combination of

$\sf X^{3+}$and$\sf \: Cl^{-}$ and thus to form a neutral compound$\sf \: XCl_3$

is formed.

Option 4 is correct W₃Cl, W₂O₃