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1. Matter in Our Surroundings
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Q2 of 65 Page 21

Find out the incorrect increasing/decreasing order in the following.

The correct option is (d) because as we know that kinetic energy of the gases is maximum, liquid is intermediate and solids is minimum. Hence, the order is:


Hydrogen (gas) > honey (solid but has high density than water) > water

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35

Neha by mistake spilled a glass of water on the floor. Her mother suggested her to switch on the fan and after few minutes she found that all water disappears. She asked her mother how this happened and where all water has disappeared. On the basis of this, answer the following questions:

(i) What was the phenomenon associated with disappearance of water?


(ii) Why her mother suggested Neha to switch on the fan?


(iii) What are the values associated with her mother?

1

The SI unit of volume is cubic metre (m3). The common unit of measuring volume in litre (L). Then, 1L = …… dm3, 1L = ………. mL and 1 mL = …….. cm3.

3

Kinetic energy of particles of water in three vessels X, Y and Z are Ex, Ey and Ez respectively. Then the temperature of water in the three vessels are

4

Which of the following statement is correct?

Questions · 65
1. Matter in Our Surroundings
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