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प्रश्न
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
उत्तर
A dry handkerchief gets wet at once because it quickly absorbs the water in which it is dipped. However, it takes longer for a wet handkerchief to dry because the water needs to evaporate from the handkerchief. Evaporation is a slow process that is dependent on other factors as well, like relative humidity.
संबंधित प्रश्न
What do you observe when :
solid ammonium chloride is heated
Fill in the blank
Burning of fuel is a _______ change.
State whether the following is physical or chemical changes.
Melting of wax —
State whether the following is physical or chemical changes.
Boiling of an egg —
Fill in the blank
An earthquake is a _______ change.
What role does energy play in initiating a chemical change ?
Distinguish between the following.
Natural change and man-made change
Fill in the blank with the correct word of the statement given below:
Ammonium chloride, a sublimable solid undergoes _________ on heating.
What is the change?
Cut vegetables turn brown when exposed to air, this is due to ______.
