EASY
Earn 100

Write the differences between evaporation and boiling?

Important Questions on Changes Around Us

EASY
The water kept in an earthen pot(matka) become cool during summer by which process?
MEDIUM
Read the following and select the correct option.
Statement (a) : When we pour little petrol on our palm, it causes the palm to feel cool.
Reason (b) : Particles of petrol evaporate using the energy from our palm which causes the palm to feel cool. 
MEDIUM
Three uniformly watered plants i, ii and iii were kept in 45% relative humidity, 45% relative humidity with blowing wind and 95% relative humidity, respectively. Arrange these plants in the order (faster to slowest) in which they will dry up.
EASY

Let T = Temperature; H = Humidity and v = Wind speed
Which of the following are the best suited conditions for drying up of clothes?

EASY
A person takes hot coffee by pouring it into the saucer when he is in a hurry because he knows that:
MEDIUM
Take two plants, keep plant A in very dry conditions and plant B in high humidity. Simultaneously, immerse the roots of both plants in water with a red dye. What would you observe?
EASY
"Spirit kept in an open watch glass is converted into gaseous state even at room temperature". Explain.
MEDIUM
Why does it take longer time for the evaporation process on a rainy day?
MEDIUM
Is evaporation an endothermic or exothermic process? Give one example to support your answer.
MEDIUM

Define:

A. evaporation

B. sublimation

MEDIUM
Why does our palm feel cold when we put some acetone or petrol or perfume on it?
MEDIUM

Why does water evaporate faster in a Petri dish than in a test tube?

MEDIUM

What are the factors which affect the rate of evaporation?

MEDIUM
Why does ethanol evaporate faster than water?
MEDIUM

Why do we feel cool under a fan when we perspire?

HARD
Describe the factors which affect evaporation.
MEDIUM

Why does our palm feel cold when we put some acetone, ethyl alcohol, petrol or perfume on it?

MEDIUM
Why do we wear cotton clothes in summer? 
MEDIUM
Why is it that wet clothes dry quickly in the sun than in the shade? 
EASY

Which of the following conditions will increase the evaporation of water?