HARD
10th CBSE
IMPORTANT
Earn 100

Why do atoms combine to form a molecule? 

Important Questions on Question Bank

EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 5
Why are ionic compounds hard and rigid?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 6
What happens when sodium chloride is dissolved in water?
EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 7
An atom has one electron more than its nearest noble gas atom. What type of ion can the atom form ?
HARD
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 8
A metal atom X forms an oxide of the type X2O. State the number of electrons present in the valence shell of the atom X.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 9
The valencies of zinc ion and phosphate ion are 2+ and 3- respectively. Write the formula of the compound formed when these two ions combine.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 10

Which of the following is a metal? 

A37, B13, C710

HARD
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 1
Write the electron dot structure for sodium and oxygen.
EASY
10th CBSE
IMPORTANT
Foundation Science Chemistry FOR CLASS 10>Chapter 10 - Question Bank>Question Bank>Q 2
Why do ionic compounds melt at higher temperature?