Question

C. LONG ANSWER TYPE QUESTIONS
1. Mention two characteristics of each acids, bases and indicators. ​

Answer 1

Answer:

Acids taste sour while bases taste bitter. An acid reacts with metals to produce bubbles of hydrogen gas while a base feels slimy to the touch. Acids turn blue litmus paper red while bases turn red litmus paper blue.

Explanation:

class - 7 - Science

Answer 2

Answer:

acids:- i) they are sour in taste

ii) the turn blue litmus paper red

iii) they donate hydrogen ions during reaction with bases

base:- i) they are bitter in taste

ii) they turn red litmus paper blue

iii) they donate hydroxide ions during reaction with acids

indicator:- i) they Indicates the pH value of substances

ii) they are needed to Indicate if the concentration of a soluble substance in in acidic or basis condition