eVidyarthi

MCQ Chapter 14 General Science Class 8 Maharashtra Board

MCQ For All Chapters – General Science Class 8

Measurement and Effects of Heat

1. What does the coefficient of linear expansion (λ) depend on?

Question 1 of 178

2. What is the unit of the coefficient of linear expansion?

Question 2 of 178

3. What is the coefficient of linear expansion of copper in 1/°C x 10⁶?

Question 3 of 178

4. Why are gaps kept between rails?

Question 4 of 178

5. What happens to the volume of a liquid when heated?

Question 5 of 178

6. What happens to the pressure of a gas in a closed container when heated?

Question 6 of 178

7. What is the boiling point of water in Fahrenheit?

Question 7 of 178

8. What is the freezing point of water in Kelvin?

Question 8 of 178

9. At what temperature are Celsius and Fahrenheit scales the same?

Question 9 of 178

10. How much heat is required to raise 1.5 kg of water from 15°C to 45°C in calories?

Question 10 of 178

11. What is the mass of water if 300 cal raises its temperature by 10°C?

Question 11 of 178

12. What is the final temperature in the calorimeter example with equal masses?

Question 12 of 178

13. What must the Fahrenheit temperature be to be twice its Celsius value?

Question 13 of 178

14. Up to what temperature will the iron bridge remain in good shape?

Question 14 of 178

15. What is the increase in length of the Eiffel Tower at 30°C from 15°C?

Question 15 of 178

16. If substance A has specific heat c and B has 2c, what is the mass of B?

Question 16 of 178

17. What is the specific heat of a 3 kg substance receiving 600 cal for a 10°C rise?

Question 17 of 178

18. What does a digital thermometer use to measure temperature?

Question 18 of 178

19. What is the coefficient of volume expansion of water in 1/°C x 10³?

Question 19 of 178

20. What happens to the density of a gas when heated?

Question 20 of 178

21. A.Mass of the solid

Question 21 of 178

22. B.Substance of the solid

Question 22 of 178

23. C.Initial temperature

Question 23 of 178

24. D.Final volume

Question 24 of 178

25. EXPLANATION: The document notes

Question 25 of 178

26. ANSWER: B

Question 26 of 178

27.

Question 27 of 178

28. What is the unit of the coefficient of linear expansion?

Question 28 of 178

29. A.Joule

Question 29 of 178

30. B.Calorie

Question 30 of 178

31. C.1/°C

Question 31 of 178

32. D.kg/°C

Question 32 of 178

33. EXPLANATION: The document states

Question 33 of 178

34. ANSWER: C

Question 34 of 178

35.

Question 35 of 178

36. What is the coefficient of linear expansion of copper in 1/°C x 10⁶?

Question 36 of 178

37. A.11.5

Question 37 of 178

38. B.17

Question 38 of 178

39. C.18

Question 39 of 178

40. D.23.1

Question 40 of 178

41. EXPLANATION: The table lists copper’s coefficient of linear expansion as 17 x 10⁶ (1/°C).

Question 41 of 178

42. ANSWER: B

Question 42 of 178

43.

Question 43 of 178

44. Why are gaps kept between rails?

Question 44 of 178

45. A.To reduce weight

Question 45 of 178

46. B.To allow expansion

Question 46 of 178

47. C.To prevent contraction

Question 47 of 178

48. D.To increase strength

Question 48 of 178

49. EXPLANATION: The document explains

Question 49 of 178

50. ANSWER: B

Question 50 of 178

51.

Question 51 of 178

52. What happens to the volume of a liquid when heated?

Question 52 of 178

53. A.It decreases

Question 53 of 178

54. B.It remains the same

Question 54 of 178

55. C.It increases

Question 55 of 178

56. D.It becomes zero

Question 56 of 178

57. EXPLANATION: The document states

Question 57 of 178

58. ANSWER: C

Question 58 of 178

59.

Question 59 of 178

60. What happens to the pressure of a gas in a closed container when heated?

Question 60 of 178

61. A.It decreases

Question 61 of 178

62. B.It remains constant

Question 62 of 178

63. C.It increases

Question 63 of 178

64. D.It becomes zero

Question 64 of 178

65. EXPLANATION: The document notes

Question 65 of 178

66. ANSWER: C

Question 66 of 178

67.

Question 67 of 178

68. What is the boiling point of water in Fahrenheit?

Question 68 of 178

69. A.100°F

Question 69 of 178

70. B.212°F

Question 70 of 178

71. C.273°F

Question 71 of 178

72. D.356°F

Question 72 of 178

73. EXPLANATION: The table lists the boiling point of water as 212°F.

Question 73 of 178

74. ANSWER: B

Question 74 of 178

75.

Question 75 of 178

76. What is the freezing point of water in Kelvin?

Question 76 of 178

77. A.0 K

Question 77 of 178

78. B.273 K

Question 78 of 178

79. C.296 K

Question 79 of 178

80. D.373 K

Question 80 of 178

81. EXPLANATION: The table lists the freezing point of water as 273 K.

Question 81 of 178

82. ANSWER: B

Question 82 of 178

83.

Question 83 of 178

84. At what temperature are Celsius and Fahrenheit scales the same?

Question 84 of 178

85. A.0°C

Question 85 of 178

86. B.-40°C

Question 86 of 178

87. C.32°C

Question 87 of 178

88. D.100°C

Question 88 of 178

89. EXPLANATION: The solved example calculates

Question 89 of 178

90. ANSWER: B

Question 90 of 178

91.

Question 91 of 178

92. How much heat is required to raise 1.5 kg of water from 15°C to 45°C in calories?

Question 92 of 178

93. A.30

Question 93 of 178

94. B.45

Question 94 of 178

95. C.60

Question 95 of 178

96. D.188

Question 96 of 178

97. EXPLANATION: The solved example shows

Question 97 of 178

98. ANSWER: B

Question 98 of 178

99.

Question 99 of 178

100. What is the mass of water if 300 cal raises its temperature by 10°C?

Question 100 of 178

101. A.10 gm

Question 101 of 178

102. B.20 gm

Question 102 of 178

103. C.30 gm

Question 103 of 178

104. D.40 gm

Question 104 of 178

105. EXPLANATION: The solved example calculates

Question 105 of 178

106. ANSWER: C

Question 106 of 178

107.

Question 107 of 178

108. What is the final temperature in the calorimeter example with equal masses?

Question 108 of 178

109. A.30°C

Question 109 of 178

110. B.32.29°C

Question 110 of 178

111. C.60°C

Question 111 of 178

112. D.90°C

Question 112 of 178

113. EXPLANATION: The solved example concludes

Question 113 of 178

114. ANSWER: B

Question 114 of 178

115.

Question 115 of 178

116. What must the Fahrenheit temperature be to be twice its Celsius value?

Question 116 of 178

117. A.160°F

Question 117 of 178

118. B.212°F

Question 118 of 178

119. C.320°F

Question 119 of 178

120. D.400°F

Question 120 of 178

121. EXPLANATION: The exercise solution provides

Question 121 of 178

122. ANSWER: C

Question 122 of 178

123.

Question 123 of 178

124. Up to what temperature will the iron bridge remain in good shape?

Question 124 of 178

125. A.18°C

Question 125 of 178

126. B.35.4°C

Question 126 of 178

127. C.50°C

Question 127 of 178

128. D.60°C

Question 128 of 178

129. EXPLANATION: The exercise solution provides

Question 129 of 178

130. ANSWER: B

Question 130 of 178

131.

Question 131 of 178

132. What is the increase in length of the Eiffel Tower at 30°C from 15°C?

Question 132 of 178

133. A.2.3 cm

Question 133 of 178

134. B.5.6 cm

Question 134 of 178

135. C.10 cm

Question 135 of 178

136. D.15 cm

Question 136 of 178

137. EXPLANATION: The exercise solution provides

Question 137 of 178

138. ANSWER: B

Question 138 of 178

139.

Question 139 of 178

140. If substance A has specific heat c and B has 2c

Question 140 of 178

141. A.m

Question 141 of 178

142. B.2m

Question 142 of 178

143. C.3m

Question 143 of 178

144. D.4m

Question 144 of 178

145. EXPLANATION: The exercise solution provides

Question 145 of 178

146. ANSWER: B

Question 146 of 178

147.

Question 147 of 178

148. What is the specific heat of a 3 kg substance receiving 600 cal for a 10°C rise?

Question 148 of 178

149. A.0.0033 cal/(gm°C)

Question 149 of 178

150. B.0.033 cal/(gm°C)

Question 150 of 178

151. C.0.33 cal/(gm°C)

Question 151 of 178

152. D.3.3 cal/(gm°C)

Question 152 of 178

153. EXPLANATION: The exercise solution provides

Question 153 of 178

154. ANSWER: A

Question 154 of 178

155.

Question 155 of 178

156. What does a digital thermometer use to measure temperature?

Question 156 of 178

157. A.Expansion of alcohol

Question 157 of 178

158. B.Expansion of mercury

Question 158 of 178

159. C.A sensor

Question 159 of 178

160. D.A piston

Question 160 of 178

161. EXPLANATION: The document states

Question 161 of 178

162. ANSWER: C

Question 162 of 178

163.

Question 163 of 178

164. What is the coefficient of volume expansion of water in 1/°C x 10³?

Question 164 of 178

165. A.0.2

Question 165 of 178

166. B.1.0

Question 166 of 178

167. C.1.3

Question 167 of 178

168. D.3.66

Question 168 of 178

169. EXPLANATION: The table lists water’s coefficient of volume expansion as 0.2 x 10³ (1/°C).

Question 169 of 178

170. ANSWER: A

Question 170 of 178

171.

Question 171 of 178

172. What happens to the density of a gas when heated?

Question 172 of 178

173. A.It increases

Question 173 of 178

174. B.It remains the same

Question 174 of 178

175. C.It decreases

Question 175 of 178

176. D.It doubles

Question 176 of 178

177. EXPLANATION: The document states

Question 177 of 178

178. ANSWER: C

Question 178 of 178

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