Question

1. A substance which dissolves in water to give hydrogen ions as the only positively charged ion is called__________. (1) A base (2) A salt (3) An acid (4) None of these 2. Which of the following is a tribasic acid? (1) H2SO4 (2) CH3COOH (3) HNO3 (4) H3PO4 3. Which of the following is acidic in nature? (1) Lime juice (2) Human blood (3) Lime water (4) Antacid 4. The correct way of making a solution of acid in water is to_______. (1)Add water to acid (2) Add acid to water (3) Mix acid and water simultaneously (4) Add water to acid in a shallow container 5. Blue litmus paper is dipped in a solution. It turns blue litmus to red. What is the nature of solution? (1) Acidic (2) Basic (3) Neutral (4) None of these 6. Which of the following is a property of an acid? (1) Sweet taste (2) Sour taste (3) Bitter taste (4) Salty taste 7. Which of the following is a strong acid? (1) Nitric acid (2) Citric acid (3) Acetic acid (4) Tartaric acid 8. A lot of feeding is required at the _______ stage. (1) Silkworm (2) Cocoon (3) Adult (4) All of these 9. The cocoon spun by the silkworm is made up of a single filament ranging between ______ to ______ meter in length. (1) 600-1500 (2) 600-1200 (3) 500-1100 (4) 600-800 10. The acid found in lemons is _______ acid. (1) Malic (2) Formic (3) Citric (4) Acetic

Answer 1

Answer:

1Acid

3lime water

4add acid to water

5it is acid

6 sour

7nitric acid

Answer 2

Answer:

1/ans:- A salt

2/ans:- HNO3

3/ans:- Human blood

4/ans:- Add water to acid

5/ans:- Basic

6/ans:- Salty taste

7/ans:- Acetic acid

8/ans:- Adult

9/ans:- 600-1500

10/ans:- Formic