A cloth strip dipped in onion juice is used for testing a liquid X. The liquid X changes its odour. Which type of an indicator is onion juice ? The liquid 'X turns blue litmus red. List the observations the liquid x will show on reacting with the following: (a) Zinc granules (b) Solid sodium carbonate.
Write the chemical equations for the reactior .
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Explanation: when a drop of hydrochloric acid is added to China rose indicator it will change into dark pink or magenta colour which shows that the solution is acidic. e)when a drop of dilute sulphuric acid is added to red cabbage juice it turns into pink colour which shows that the solution is acidic.
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1). Onion is an olfactory indicator that means it changes its odour when reacted to acid and bases .
2). The liquid ' X ' is an acid because it turns blue litmus red .
a). When an acid is reacted with zinc granules , hydrogen gas is evolved .
b). When an acid is reacted with sodium carbonate , salt is formed .
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