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41
Insects can move on the surface of water without sinking due to
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Answer: Option B
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42
In cold weather, aquatic animals survive even when water at the top layer of the lake freezes into ice because
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Answer: Option D
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43
The size of the Respirable Suspended Particulate Matter (R.S.P.M.) in air is
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Answer: Option D
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44
A body is just floating in a liquid if the body is slightly pressed down and released. It will
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Answer: Option B
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45
Two pieces of different metals, when completly immersed in water, experience equal upthrust, then
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Answer: Option B
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46
The relative density of silver is 10.8. The density of water is 103kgm-3. What will be the density of silver in SI unit.
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Answer: Option A
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47
Which of the following increases when the pressure exerted by a solid decreases-
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Answer: Option C
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48
When the temperature increases, the angle of contact of liquid
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Answer: Option A
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49
When a cork and a iron nail are placed in a beaker filled with water, the cork floats while the iron nail is submerged.
What is the reason behind it?
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Answer: Option B
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50
The rain drops are spherical because
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Answer: Option C
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