The formula of the compound formed by the pair of elements $A l$ & $S$ is:

A l_{2} S_{3}

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A l_{3} S_{2}

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A l_{4} S_{3}

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A l S_{3}

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Solution

The correct option is B $A l_{2} S_{3}$
The chemical formula of the compound is determined by valencies of the elements involves. valency of $A l$ is $3$ and of Sulphur is $2$ . The formula is obtained by cross multiplying the valencies of the two elements.

Hence, the correct option is $A$

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Similar questions

Question 48
Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements.
(a) $Mg and N_{2}$
(b) $Li and O_{2}$
(c) $Al and {Cl}_{2}$
(d) $K and O_{2}$

Give the formulae fo the compound that would be formed by the ombinatiion of the ollowing pairs of elements:
(a) $M g a n d N_{2}$ (b) $L i a n d O_{2}$ (c) $A l a n d C l_{2}$ (d) $K a n d H$

Q. Predict the formulae of the binary compounds formed by combination of the following pairs of elements:
(i) Magnesium and nitrogen
(ii) Silicon and oxygen

Q. The formula of the compund formed by the pair of elements

S i

B r

is:

Q. Using the periodic table, predict the formulas of compounds which might be formed by the following pairs of elements:
(a) silicon and bromine
(b) aluminium and suplhur.

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The formula of the compound formed by the pair of elements Al & S is:

The correct option is B Al2S3The chemical formula of the compound is determined by valencies of the elements involves. valency of Al is 3 and of Sulphur is 2. The formula is obtained by cross multiplying the valencies of the two elements.Hence, the correct option is A

The formula of the compound formed by the pair of elements $A l$ & $S$ is:

The correct option is B $A l_{2} S_{3}$
The chemical formula of the compound is determined by valencies of the elements involves. valency of $A l$ is $3$ and of Sulphur is $2$ . The formula is obtained by cross multiplying the valencies of the two elements.

Hence, the correct option is $A$