Q.

Study the given Venn diagram carefully 

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Identify A, B and C

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a

A-Are sour in taste, B-React with carbonates, C-Are soapy to touch

b

A-do not react with metals, B-React with litmus, C-do not react with carbonates

c

A-Have OH- > H+ , B-Have OH- = H+, C-Have  H+ > OH-

d

A-React with carbonates to form CO2 gas, B-Can be identified by using indicators, C-react with both HCl and NaOH 

answer is D.

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Detailed Solution

Acids reacts with carbonates to form CO2 gas. Bases turn china rose indicator green.
Both acids and bases can be identified by using indicators. 

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