EASY
7th ICSE
IMPORTANT
Earn 100

Define metalloids. Give examples of metalloids.

Important Questions on Elements, Compounds and Mixtures

MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 5

Write the valencies of the elements given below:

Beryllium, fluorine, silicon, argon, calcium.

MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>THINK ZONE>Q 1
How can you justify that air is a mixture not a compound?
MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 1
What does the formula of compound signifies?
MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 2

Write the formula of the following compound.

Sugar

EASY
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 2

Write the formula of the following compound.

Washing soda

EASY
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 2

Write the formula of the following compound.

Marble

EASY
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 2

Write the formula of the following compound.

Sand

MEDIUM
7th ICSE
IMPORTANT
Innovative Chemistry>Chapter 3 - Elements, Compounds and Mixtures>ASSESS YOURSELF>Q 3

Explain the valency in the following compound:

Ammonia