Question

State 'True' or 'False':
1. Nitric acid turns red litmus blue.
2. Sodium hydroxide turns blue litmus red.
3. Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water.
4. Indicator is a substance which shows different colours in acidic and basic solutions.
5. Tooth decay is caused by the presence of a base.
6. Both acids and bases change colour of all indicators.
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Answer 1

Answer:

1) false

2)false

3)true

4)true

5)false

6)false

Explanation:

(1) acid turns blue litmus red

(2) base turns red litmus blue

(3) sodium hydroxide is a base and hydrochloric acid is an acid (really obvious) ......when they come in contact with each other they form salt and water

(4)indicators indicate wether the substance is a base or an acid by either changing its colour or odour

(5)tooth decay is caused by acids produced by bacteria present in mouth

(6)phenolphthalein remains colourless when in contact with an acis

Answer 2

Answer:

ur ans is ⬇️⬇️

false

false

true

false

true

false

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