A. VERY SHORT ANSWER TYPE QUESTIONS
1. Name two naturally occurring acids with their source.
2. How does a litmus detect acidic and basic solutions ?
3. How does an indicator differentiate an acid and a base ?
4. Name a base used in antacids.
5. When a red litmus paper is dipped in a solution, it turned blue. What is the nature of the solution ?
Answers
Answer:
1. citric acid from lemon and malic acid from apple
2. litmus changes its colour from blue to red in contact with acid and from red to blue in contact with base
3. an indicator changes its colour according to the contact with acid and base in this way it differentiates between an acid and base
4. It could be baking soda( NaHCo3)
5. the nature of the solution will be basic
Heyy friend ! ☺
>> Here's your answer :
✓ Ans 1. Two naturally occurring acids with their sources are :
- citric acid - lemon
- acetic acid - sour milk(curd)
✓ Ans 2. When you dip a litmus paper in the solution, the colour change in litmus can be used to detect whether solution is acidic or basic.
Blue litmus turns red in an acidic solution , whereas red litmus turns blue in basic or alkaline solution.
✓ Ans 3. An indicator is used to detect whether an aqueous solution is acidic or basic. A pH indicator detect the presence of H+ or OH- ions and thereby indicate whether solution is acidic or basic by a colour change. They do this by reacting with the H+ and OH- ions of the solution.
✓ Ans 4. Carbonates and hydroxides are the bases used in antacids.
✓ Ans 5. When a red litmus paper is dipped in a solution, it turned blue , it is a basic or alkaline solution .
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Thank you !
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