MEDIUM
9th CBSE
IMPORTANT
Earn 100

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

22.58% studentsanswered this correctly

Important Questions on The Matter in Our Surroundings

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
MEDIUM
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 19
If the boiling point of a liquid is very high, it indicates that
EASY
9th CBSE
IMPORTANT
Core science chemistry>Chapter 1 - The Matter in Our Surroundings>EXERCISE 1D>Q 20
We wear cotton clothes in summer because: