false, the rusting of iron can be prevented by painting, oiling, greasing or varnishing its surface.
Answer:
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Answer:
A. 20 grams of milk at 10°C
Explanation:
Since we refrigerate milk, it would be cooler than the room temperature, which standard norm is 25°C. So the milk has to be colder than the room temperature. Therefore, our answer is A.
Answer : The change in entropy is 
Explanation :
Formula used :

where,
= change in entropy = ?
m = mass of water = 1.00 kg
= heat of vaporization of water = 
T = temperature = 
Now put all the given values in the above formula, we get:


Therefore, the change in entropy is 