ICSE Class 10 Chemistry 2023 Solved Paper

SECTION - I

Choose the correct answers to the questions from the given options.

Question : 6 of 88

Marks: +1, -0

The metallic hydroxide which forms a deep inky blue solution with excess ammonium hydroxide solution is :

Solution:

(b)

{\Ca}( {\OH})_2

Explanation:

{\CuSO}_4+2 {\NH}_4 {\OH} → ( {\NH}_4) _2 {\SO}_4

+ {\Cu}( {\OH})_2

{\Cu}( {\OH})_2+ ( {\NH}_4) _2 {\SO}_4+ {\NH}_4 {\OH} → { [ {\Cu} ( {\NH}_3) _4] {\SO}_4 }

+4 {\H}_2 {\O}

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