Question

2 This is basic in nature.
(a) Baking soda O (b) Curd
(c) Vinegar
(d) Salt solution
3. Which of the following statements is not correct?
(a) Blue litmus paper remains blue in bases.
(b) Turmeric paper changes to red in bases.
(c) Turmeric paper remains yellow in acids.
(d) Phenolphthalein remains colourless in bases.
4. The acid present in sour milk is
(a) Acetic acid
(b) Lactic acid
(c) Formic acid
(d) Hydrochloric acid
5. The acid present in our stomach that helps in digestion of food is
(a) Nitric acid
(b) Acetic acid
(c) Hydrochloric acid
(d) Sulphuric acid
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Answer 1

Answer:

2) (a)

3) (a) , (d) , (b)

4) (b)

5) (d)

explanation: 3) a) blue litmus paper remains red in bases b) Turmeric paper turns into red when it is dipped into basic solution. d) it turns colorless in acidic solutions and pink in basic solutions.

Answer 2

Answer:

2-a) baking soda

3- d) phenolphthalein remains colourless in bases

4-b) Lactic acid

5-c) hydrochloric acid