1.

Correct the statement if it is wrong: a) Indicators show different colours in acidic and basic solutions. b) Sodium hydroxide turns blue litmus red. c) Tooth decay is caused by the presence of base.

Answer»

a) Indicators show different colours in acidic and basic solutions. 

b) Sodium hydroxide turns red litmus blue. 

c) Tooth decay is caused by the presence of acid.



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