MEDIUM
7th CBSE
IMPORTANT
Earn 100

Name the elements present in the following compound and write their valency.
Copper (II) hydroxide

Important Questions on Matter and Chemical Formulae

EASY
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 1
The number of protons is equal to the number of _____ in an atom.
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 4
The symbolic representation of a chemical reaction
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 4
The elements or compounds that react to form a new substance during a chemical change are:
EASY
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 4
A chemical equation containing unequal number of atoms of reactants and products is: (Balanced chemical equation / Unbalanced chemical equation)
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>ASSESSMENT ZONE>Q A
What is the charge on an electron?
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>ASSESSMENT ZONE>Q A
An atom consists of _____.
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>ASSESSMENT ZONE>Q F
 Name the elements present in the following compound and write their valency.
 Sulphur dioxide
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>ASSESSMENT ZONE>Q F
A substance when viewed under an electron microscope revealed that it contains only one kind of atoms. Is the substance an element, compound or mixture?