EASY
9th CBSE
IMPORTANT
Earn 100

Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion?

Important Questions on Matter in Our Surroundings

HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 23
You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 24
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 25
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 26
Comment on the following statement:
Evaporation produces cooling.
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 26
Comment on the following statement:
Sponge though compressible is a solid.
MEDIUM
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 26
Comment on the following statement:
Rate of evaporation of an aqueous solution decreases with increase in humidity.
HARD
9th CBSE
IMPORTANT
NCERT Exemplar Science - Class 9>Chapter 1 - Matter in Our Surroundings>Long Answer Questions>Q 27
Why does the temperature of a substance remain constant during its melting point or boiling point?