EASY
9th CBSE
IMPORTANT
Earn 100

Water at 373 K change to steam at 373 K by absorbing heat energy. The heat energy so absorbed is called _____. 

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Important Questions on The Matter in Our Surroundings

MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 11
A solid changes into a liquid at its melting point by absorbing heat energy, but the temperature does not rise. Which of the following statement is incorrect?
MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 12
Which of the following is an incorrect statement?
When steam at 100 °C is allowed to cool, it gives out heat energy to form water at 100 °C. The loss of heat energy
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 13
During the liquefaction of air:
HARD
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 14
Which is the incorrect statement.
Desert coolers, cool better on hot and dry day because
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 15
Ammonium chloride on heating changes into a gaseous state and on cooling on the same cold surface again changes into a solid-state. The solid-state of matter so obtained after heating is called:
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 16
Naphthalene balls disappear with time without leaving any residue. Such change is called 
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 17
At 273 K, water is in the state of :
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 18
Steam at 100 Cο causes more severe burns on the skin than water at 100 Cο because