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Which of the following compound is formed when aluminium reacts with an alkali?

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in Chemistry – Class 11 by (148k points)
Which of the following compound is formed when aluminium reacts with an alkali?

(a) sodium Tetra hydroxyl aluminate V

(b) sodium Tetra hydroxyl aluminate III

(c) sodium Penta hydroxyl aluminate IV

(d) sodium Septa hydroxyl aluminate III

I got this question in an online interview.

Origin of the question is p-Block Elements topic in portion p-Block Elements of Chemistry – Class 11

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The correct option is (b) sodium Tetra hydroxyl aluminate III

The best I can explain: When two moles of aluminium atom is combined with two moles of sodium hydroxide in presence of 6 moles of water, two moles of sodium tetra hydroxyl aluminate III is formed along with three moles of the hydrogen molecule.

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