AP 7th Science Mock Test for 2023 for Chapter – 2 : “Acids and Bases” Online Practice Test

1. Acids are ______ to taste.

2. An example of natural acid _______

3. The colour of methyl orange indicator in acidic solution _______

4. The colour of methyl orange indicator in basic solution _______

5. The colour of Phenolphthalein indicator in basic solution _______

6. In the following, which one is neutral solution _______

7. When acids react with metals ________ gas is evolved.

8. An example of natural indicator .

9. For removing ink stains on clothes ______ acid is used .

10. Oxides of magnesium dissolved in water forms ________

11. Acid rains are caused due to _____

12. A with crafts cuts a lemon and pretends the red colour fluid as blood : as a science student. What is the chemical he applied on knife to become lime juice red in colour .

13. We find lactic acid in ________

14. We find lactic acid in ________

15. We find acetic acid in ________

16. We find citric acid in ________

17. We find oxalic acid in ________

18. When a scratch is contacted with lemon juice we feel burning sensation. why ?

19. Why farmers use calcium hydroxide in the field ?

20. Among these which is the glass cleaner

21. Find the product doesn't belongs to base ?

22. Acids turn _______ due to addition of methyl orange .

23. 10 drops of dil.HCl is mixed with 2 drops of phenolphthalein solution followed by sufficient adding of baking soda . What would be the result ?

24. You conducted tests on butter milk, tomato, grape juice etc., What type of conditions are seen in those substances ?

25. You found that the eating food is sour in taste . What type of substance it is ?

26. Ram felt burning sensation at the site of ant bite . What is the reason behind ?

27. Testing copper pieces with lemon juice gives the result of producing

28. Suppose you tested HCl with Sodium bi carbonate. What is the product produced ?

29. This is used in pickle industry

30. Municipality and Panchayat staff are using bleaching powder containing the base called ________

31. Which one you choose to clean the stains on the mirror

32. Acid rains are more prominent in ____

33. Preserving pickles, jams, jellies etc ., are done only in China marble containers. Why ?

34. Observe the diagram . What is the gas releasing in this reaction ?

35. What is the chemical present in the given image ?

36. What do you observe from the diagram ?

37. The name of the chemical that is labelled at '?' symbol .

38. If you want to cook food with citric acid, what type of delicious item you would prepare ?

39. Baking industry commonly depends on this chemical

40. The chemical used in manufacturing of fertilizers and batteries.

41. We use NaCl in the name of _____ in our day to day life .

42. Methyl orange converts acids into which colour ?

43. Methyl orange converts base into which colour ?

44. What is the acid present in grapes ?

45. The following one helped in stain removing ?

46. Which of the following is an acidic salt ?

47. Which of the following is a basic salt ?

48. Which of the following is a neutral salt ?

49. Which of the following is not an acidic salt ?

50. Which of the following is a neutral salt ?

51. The substances that turn blue litmus to red litmus are generally

52. The substances that turn red litmus to blue litmus are generally

53. The substances that turn doesn't bring any change in either red litmus or blue litmus are generally

54. Which of the following is a basic salt ?

55. Which of the following are natural indicators ?

56. Which of the following are natural indicators ?

57. What is the use of indicators ?

58. What are the natural acids ?

59. Which of the following are natural acids ?

60. Which of the following is not a natural acid ?

61. Acids react with metals and liberates ______

62. Acids react with metals and liberates ______

63. Acids react with the following with liberation of hydrogen gas.

64. Acids react with pieces of marbles and liberate _______ gas

65. The following gas turns lime water into milky .

66. Neutralization process is the formation of salts due to combination of

67. The sting of wasp is ______ in nature .

68. How can we treat the sting of wasp ?

69. What happens when nitric acid is added to egg shells ?

70. What will happen to blue litmus paper when we applied lemon juice on it ?

71. What will happens to the metal container when we stored acid in it ?

72. What will happens to the turmeric paper when applied soap solution ?

73. What is the nature of urine ?

74. Sodium hydroxide turns blue litmus to

75. Is vinegar acid ?

76. What is the acid present in vinegar ?

77. Lactic acid is present in

78. What is the effect of copper sulphate on blue litmus ?

79. What is the effect of common salt on blue litmus ?

80. What is the effect of sodium carbonate on red litmus ?

81. Which of the following are mineral acids ?

82. Which of the following is not a mineral acid ?

83. Which of the following is not a mineral acid ?

84. Acids are _____ in taste .

85. Bases are _____ in taste .

86. Sodium carbonate is a ______ .

87. Copper sulphate is a ______ .

88. Sodium chloride is a ______ .

89. Potassium chloride is a ______ .

90. Potassium cyanide is a ______ .

91. Bases are ______ to touch .

92. Ammonium chloride is a ______ .

93. Acid rains are caused due to mixing of the following in rain water ?

94. What happens when sulphuric acid reacts with pieces of marbles ?

95. Sweat is _____  in nature .

96. Detergent soap turns phenolphthalein into ______ .

97. Detergent soap turns methyl orange into ______ .

98. Lime water turns methyl orange into ______ .

99. Lime water turns phenolphthalein into ______ .

100. Spirit turns phenolphthalein into ______ .