MEDIUM
9th CBSE
IMPORTANT
Earn 100
Match the following and choose the correct code :
Column I
Column II
A. Triatomic molecules
(i)
B. Monoatomic molecules
(ii)
C. Tetratomic molecules
(iii)
D. Diatomic molecules
(iv)
50% studentsanswered this correctly
Important Questions on Atoms and Molecules
MEDIUM
9th CBSE
IMPORTANT
Match the following and choose the correct code:
| Column I | Column II |
| A. Carbon tetrachloride | (i) |
| B. Dinitrogen pentaoxide | (ii) |
| C. Phosphorus pentachloride | (iii) |
| D. Nitrogen dioxide | (iv) |
MEDIUM
9th CBSE
IMPORTANT
Match the following and choose the correct code:
| Column I | Column II |
| A. Sodium oxide | (i) |
| B. Magnesium hydroxide | (ii) |
| C. Aluminium chloride | (iii) |
| D. Sodium sulphide | (iv) |
HARD
9th CBSE
IMPORTANT
Match the following and choose the correct code:
| Column I | Column II |
| A. Water | (i) |
| B. Hydrochloric acid | (ii) |
| C. Sulphur | (iii) |
| D. Ethyne | (iv) |
HARD
9th CBSE
IMPORTANT
Calculate the ratio of the number of molecules in of oxygen and of hydrogen.
HARD
9th CBSE
IMPORTANT
Calculate the mass of one billion molecules of water. M () .
HARD
9th CBSE
IMPORTANT
Calculate the number of atoms in of sodium.
MEDIUM
9th CBSE
IMPORTANT
Using the mole concept, calculate the mass of one molecule of in .
HARD
9th CBSE
IMPORTANT
If one mole of carbon atoms weighs , what is the mass in gram of atom of carbon?
