State five tests for ammonia where a colour change is involved.

1.	State five tests for ammonia where a colour change is involved.
Answer» Tests for ammonia : 1. Ammonia turns red (or purple) litmus solution to blue. 2. Ammonia turns methyl orange solution to yellow. 3. Ammonia turns phenolphthalein (colourless) solution to pink. 4. Ammonia turns Nesseler’ reagent (colourless) solution to pale brown. 5. Ammonia (when in excess) gives a deep blue coloured solution with CuSO₄ (aq.)

Answer»

Tests for ammonia :

1. Ammonia turns red (or purple) litmus solution to blue.

2. Ammonia turns methyl orange solution to yellow.

3. Ammonia turns phenolphthalein (colourless) solution to pink.

4. Ammonia turns Nesseler’ reagent (colourless) solution to pale brown.

5. Ammonia (when in excess) gives a deep blue coloured solution with CuSO₄ (aq.)

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