Subject :NSO Class : Class 3
The temperature changes in a kettle of water was recorded for 14 minutes and represented
in the graph as shown.
Which of the following statements is/are true?
1. The water in the kettle was initially in the liquid state.
2. There was less water in the kettle at point 'e' than at
point 'a'.
3. The water took 6 minutes to reach its boiling point
after it was heated.
4. The kettle of water was heated for 6 minutes.
A 1 and 2
B 1 and 3
C 1, 2 and 3
D 1, 3 and 4
pl explain
Ans 1:
Class : Class 4
The correct answer is A .
Ans 2:
Class : Class 10
A. 1 and 2
Point 1 is correct and simple to understand.
Point 2 is correct because some water would have evaporated after it reached boiling point.
Point 3 is incorrect because the heating started at 3 and it reached boiling point at 6. So it took 3 minutes to reach boiling point.
Point 4 is incorrect because as per the graph water was heated from point 3 till point 11 i.e. for 8 minutes.
Ans 3:
Class : Class 6
Ans 4:
Class : Class 7