41. The chemical formula of washing soda is
42. When sodium bicarbonate is placed on a strip of Ph paper, the color of the strip is . . . . . . . .
43. Match List I with List II.
List-I
List-II
a. Tartaric acid
1. Red ants
b. Formic acid
2. Grapes
c. Uric acid
3. Apples
d. Maleic acid
4. Urine of mammals
| List-I | List-II |
| a. Tartaric acid | 1. Red ants |
| b. Formic acid | 2. Grapes |
| c. Uric acid | 3. Apples |
| d. Maleic acid | 4. Urine of mammals |
44. The buffer action of blood is due to the presence of
45. Aqueous solution of copper sulphate
46. When hard water is evaporated completely the white solid remains in the container. It may be due to the presence of
1. Carbonates of Ca and Mg.
2. Sulphates of Ca and Mg.
3. Chlorides of Ca and Mg.
Select the correct answer
1. Carbonates of Ca and Mg.
2. Sulphates of Ca and Mg.
3. Chlorides of Ca and Mg.
Select the correct answer
47. Which of the following solutions is the most acidic of all?
48. With reference to ionic compounds, consider the following statements.
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are a good conductor of electricity.
Which of these statements is/are correct?
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are a good conductor of electricity.
Which of these statements is/are correct?
49. In a mixture, the ratio of salts and acids is 5 : 7. If the weight of the mixture is 360gm, what will be the weight of the acid present in it?
50. Which compound, when dissolved in water, conducts electricity and forms a basic solution?
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