ACIDS, BASES AND SALTS
VERY SHORT ANSWER TYPE QUESTIONS
1. Name two natural indicators.
2. Name two indicators that are usually used in chemical laboratories to indicate acidic/basic
nature of a solution.
3. What is the general name of bases that are soluble in water?
4. What is an acid?
5. Define base
6. What is the action of an acid on blue litmus paper?
7. Name two natural substances that contain acid.
8. What is the oxide of a metal called?
9. Are all bases alkalis?
10. Which type of substance is used to indicate an acid or a base?
11. What is the common element present in all acids?
12. Give the name and formula of two mineral acids.
13. Common salt contains a substance which is hygroscopic. Name the substance and write its
formula.
14. Name any two organic acids.
15. What is the common to all bases?
16. Name two sources of common salt.
17. How do metals react with acid?
18. Name two metals that react with a base to produce hydrogen gas.
19. Which gas i evolved when sodium carbonate reacts with hydrochloric acid?
20. What happens when carbon dioxide gas is passed into lime water?
21. Name a sodium compound which loses its water of crystallization on exposure to air.
22. A c mpound of metal is obtained mainly from sea water. Write the name and formula of
the compound.
23. What is the common name and formula of sodium hydroxide?
24. What is the reaction called in which an acid and a base nullify the effect of each other?
25. Name the salt which was an important symbol in India’s struggle for freedom?
26. Name a sodium compound used as a cleansing agent for domestic purposes.
27. Why does and aqueous solution of an acid conduct electricity?
28. The pH of a solution is 4. What is the nature of the solution?
29. A solution reacts with crushed egg-shells to give a gas that turns lime water milky. Say,
whether the solution contains an acid or a base.
30. Which type of medicine is used to treat indigestion?
31. Which compound of a metal is a constituent of many dry soap powders?
32. Name the acid which is used as a bathroom cleaner.
33. What is the action of litmus on an aqueous solution of ammonium chloride?
34. Why is a basic substance used to treat a honey-bee sting?
35. A solution turns blue litmus re. What is it pH value?
36. Which one is more acidic, pH = 2 or pH = 5?
37. Which one of the two solutions is more basic, pH = 8 or pH = 11?
38. What is the nature of the salt which dissolves in water to produce a solution which turns
blue litmus to red?
39. A milkman adds some baking soda to fresh milk. How will the pH of the fresh milk
change?
40. What is the pH of a solution which is neither acidic nor basic?
41. What is the chemical formula of common salt?
42. Name the process by which sodium hydroxide is made by electrolysis of brine?
43. Give the chemical name and formula of washing soda?
44. Mention the property of sodium carbo ate that makes it useful as an ingredient for dry soap
powders.
45. Name the carbonate of a metal which is soluble in water.
46. What is soda ash?
47. State whether the aqueous solution of washing soda is acidic or alkaline?
48. Name the substanc which on being treated with chlorine yields bleaching powder.
49. Write the chemical formula of plaster of paris.
50. Write an equation to show the reaction between plaster of paris and water.
51. Write th chemical formula of quicklime.
52. Name a compound of calcium which is used for whitewashing.
53. Which compound of calcium is used for making cement and glass?
54. Write an equation to show the reaction between quicklime and water.
55. Which compound of calcium is used to produce limelight?
56. Write the chemical name and formula of baking soda?
57. Name a compound of sodium which is used in fire extinguisher.
58. Write the chemical name and formula of bleaching powder?
59. Two solutions have pH number 4 and 9 respectively which solution has more H+
ion
concentration?
60. Which compound of calcium is used for disinfecting water?
61. Why should cured and sour substances not be kept in brass and copper vessel?
62. Name a compound of calcium which hardens on being mixed with water.
63. Write down the molecular formula for one strong and one weak acid.
64. Explain why plaster of Paris should be stored in a moisture proof container?
65. Name the gas evolved when dil. sulphuric acid acts on sodium carbonate.
66. What is the use of common salt in soap industry?
67. Which compound of calcium is used in paper and textile industries?
68. What do you observe when a burning candle is brought near the test tube containing
hydrogen gas?
69. Name the indicator used to measure pH values over the whole range.
70. A white, solid substance is used to disinfect water, and it makes wool shrink-proof. Name
the substance.
71. How many water of crystallization an present in copper sulphate crystals?
72. Write the name and formula of a compound which contains ten molecules of water of
crystallization?
73. Name a sodium compound which is used in softening hard water.
74. A white powdery substance smells of chlorine and is used for disinfecting drinking water.
What is the name of substance?
75. What happen when anhydrous copper sulphate is moistened with water?
76. Name the substance produced by the action of chlorine on dry slaked lime.
77. Name the compound of calcium used for bleaching cloth.
78. A compound is used to make casts for statues and for holding broken limbs and joints in
place. What is this compound?
79. Write chemical equation to represent the action of dilute hydrochloric acid on bleaching
powder?
80. Represent the reaction between plaster of paris and water in the form of an equation.
VERY SHORT ANSWER TYPE QUESTIONS
1. Name two natural indicators.
2. Name two indicators that are usually used in chemical laboratories to indicate acidic/basic
nature of a solution.
3. What is the general name of bases that are soluble in water?
4. What is an acid?
5. Define base
6. What is the action of an acid on blue litmus paper?
7. Name two natural substances that contain acid.
8. What is the oxide of a metal called?
9. Are all bases alkalis?
10. Which type of substance is used to indicate an acid or a base?
11. What is the common element present in all acids?
12. Give the name and formula of two mineral acids.
13. Common salt contains a substance which is hygroscopic. Name the substance and write its
formula.
14. Name any two organic acids.
15. What is the common to all bases?
16. Name two sources of common salt.
17. How do metals react with acid?
18. Name two metals that react with a base to produce hydrogen gas.
19. Which gas i evolved when sodium carbonate reacts with hydrochloric acid?
20. What happens when carbon dioxide gas is passed into lime water?
21. Name a sodium compound which loses its water of crystallization on exposure to air.
22. A c mpound of metal is obtained mainly from sea water. Write the name and formula of
the compound.
23. What is the common name and formula of sodium hydroxide?
24. What is the reaction called in which an acid and a base nullify the effect of each other?
25. Name the salt which was an important symbol in India’s struggle for freedom?
26. Name a sodium compound used as a cleansing agent for domestic purposes.
27. Why does and aqueous solution of an acid conduct electricity?
28. The pH of a solution is 4. What is the nature of the solution?
29. A solution reacts with crushed egg-shells to give a gas that turns lime water milky. Say,
whether the solution contains an acid or a base.
30. Which type of medicine is used to treat indigestion?
31. Which compound of a metal is a constituent of many dry soap powders?
32. Name the acid which is used as a bathroom cleaner.
33. What is the action of litmus on an aqueous solution of ammonium chloride?
34. Why is a basic substance used to treat a honey-bee sting?
35. A solution turns blue litmus re. What is it pH value?
36. Which one is more acidic, pH = 2 or pH = 5?
37. Which one of the two solutions is more basic, pH = 8 or pH = 11?
38. What is the nature of the salt which dissolves in water to produce a solution which turns
blue litmus to red?
39. A milkman adds some baking soda to fresh milk. How will the pH of the fresh milk
change?
40. What is the pH of a solution which is neither acidic nor basic?
41. What is the chemical formula of common salt?
42. Name the process by which sodium hydroxide is made by electrolysis of brine?
43. Give the chemical name and formula of washing soda?
44. Mention the property of sodium carbo ate that makes it useful as an ingredient for dry soap
powders.
45. Name the carbonate of a metal which is soluble in water.
46. What is soda ash?
47. State whether the aqueous solution of washing soda is acidic or alkaline?
48. Name the substanc which on being treated with chlorine yields bleaching powder.
49. Write the chemical formula of plaster of paris.
50. Write an equation to show the reaction between plaster of paris and water.
51. Write th chemical formula of quicklime.
52. Name a compound of calcium which is used for whitewashing.
53. Which compound of calcium is used for making cement and glass?
54. Write an equation to show the reaction between quicklime and water.
55. Which compound of calcium is used to produce limelight?
56. Write the chemical name and formula of baking soda?
57. Name a compound of sodium which is used in fire extinguisher.
58. Write the chemical name and formula of bleaching powder?
59. Two solutions have pH number 4 and 9 respectively which solution has more H+
ion
concentration?
60. Which compound of calcium is used for disinfecting water?
61. Why should cured and sour substances not be kept in brass and copper vessel?
62. Name a compound of calcium which hardens on being mixed with water.
63. Write down the molecular formula for one strong and one weak acid.
64. Explain why plaster of Paris should be stored in a moisture proof container?
65. Name the gas evolved when dil. sulphuric acid acts on sodium carbonate.
66. What is the use of common salt in soap industry?
67. Which compound of calcium is used in paper and textile industries?
68. What do you observe when a burning candle is brought near the test tube containing
hydrogen gas?
69. Name the indicator used to measure pH values over the whole range.
70. A white, solid substance is used to disinfect water, and it makes wool shrink-proof. Name
the substance.
71. How many water of crystallization an present in copper sulphate crystals?
72. Write the name and formula of a compound which contains ten molecules of water of
crystallization?
73. Name a sodium compound which is used in softening hard water.
74. A white powdery substance smells of chlorine and is used for disinfecting drinking water.
What is the name of substance?
75. What happen when anhydrous copper sulphate is moistened with water?
76. Name the substance produced by the action of chlorine on dry slaked lime.
77. Name the compound of calcium used for bleaching cloth.
78. A compound is used to make casts for statues and for holding broken limbs and joints in
place. What is this compound?
79. Write chemical equation to represent the action of dilute hydrochloric acid on bleaching
powder?
80. Represent the reaction between plaster of paris and water in the form of an equation.
