MEDIUM
9th CBSE
IMPORTANT
Earn 100

An element is a pure substance which cannot be broken into simpler substances than itself and each atom of which has
(a)Equal number of protons and neutrons
(b)Equal number of electrons and protons
(c)Different number of protons but same number of electrons.
(d)Different number of protons but same number of neutrons.

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Important Questions on Is Matter Around Us Pure? (Elements, Compounds and Mixtures)
EASY
9th CBSE
IMPORTANT
Which one of the following is not a chemical substance?

EASY
9th CBSE
IMPORTANT
Ammonium chloride is separated from a mixture by

EASY
9th CBSE
IMPORTANT
What is the correct order of separating salt, sand and camphor from a mixture?

EASY
9th CBSE
IMPORTANT
Which one is not correct about a compound?

EASY
9th CBSE
IMPORTANT
Which one is not correct about a true solution?

MEDIUM
9th CBSE
IMPORTANT
Benzene and toluene (miscible liquids) are separated from their mixture by

EASY
9th CBSE
IMPORTANT
Which one is a metal?

EASY
9th CBSE
IMPORTANT
Which one is not a compound?
