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Which of the following compounds gives ONLY basic products on hydrolysis?

1. Mg3N2
2. NCl3
3. BBr3
4. PCl5

Correct answer: Mg3N2

Solution

Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3. Both Mg(OH)2 (basic) and NH3 (basic) are basic products only. NCl3 + 3H2O → NH3 + 3HOCl (hypochlorous acid is acidic). BBr3 + 3H2O → H3BO3 (weakly acidic) + 3HBr (acidic). PCl5 + 4H2O → H3PO4 (acidic) + 5HCl (acidic). Therefore only Mg3N2 gives exclusively basic products.

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