Why does our palm feel cold when we put some acetone or petrol or perfume on it?
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John has 340 marbles. He put them into 4 bags. He put the same number of marbles in each bag. How many marbles are in each bag?
340/4=85 this is the answer
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Why does our palm feel cold when we put some acetone or petrol or perfume on it?
When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surrounding or the surface of the...
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Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.
Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous. Chair and almond are forms of matter in the solid state. Cold...
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Optically active 2-iodobutane on treatment with NaI in acetone gives a product which does not show optical activity.
[Hint : Racemic mixture is obtained.]
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A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile
(a) is a better conductor of heat than the wooden tile.
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Put a tick (√) against the garbage items given in Table 16.1 which could be converted into manure. Put a cross (×) against the others.
Tick (√) against i, ii, iii, viii, x Cross (×) against iv, v, vi, vii, ix
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You are on a mountain. How do you feel there? What can you see? What do you feel like doing there?
I feel very excited to climb up on a mountain. I can see high mountains all around. In between these are deep valleys. There are also many trees all around...
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Have you warmed your hands in winter by blowing on them when they are cold? How does it feel?
Yes, I often warm my hands in winter by blowing on them when they are cold. It feels warm and cozy.
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Now put your hands at some distance from your mouth and blow again. Does the air from your mouth feel warm? Why?
When the hands are placed at some distance from the mouth and the air is blown again, this time the air from the mouth does not feel much warm. This...
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Put your finger under your nose. Can you feel any air when you breathe out from your nose?
Yes, I can feel the air when I breathe out from your nose
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