MEDIUM
9th CBSE
IMPORTANT
Earn 100

Smoke and fog both are aerosols. In what way are they different?

Important Questions on Is Matter Around Us Pure?
EASY
9th CBSE
IMPORTANT
The composition of a sample of steel is iron, carbon and other elements.

EASY
9th CBSE
IMPORTANT
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.

EASY
9th CBSE
IMPORTANT
Metallic sodium is soft enough to be cut with a knife.

EASY
9th CBSE
IMPORTANT
Most metal oxides form alkalis on interacting with water.

MEDIUM
9th CBSE
IMPORTANT
The teacher instructed three students and respectively to prepare a (mass by volume) solution of sodium hydroxide . dissolved of in of water, dissolved of in of water while dissolved of in water to make of solution. Which one of them has made the desired solution and why?

EASY
9th CBSE
IMPORTANT
Dry ice is kept at room temperature and at one atmospheric pressure.

EASY
9th CBSE
IMPORTANT
A drop of ink placed on the surface of water contained in a glass spreads throughout the water.

EASY
9th CBSE
IMPORTANT
A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.
