Curriculum
Login

Curriculum

Chemistry — Second Secondary

Chemistry — Second Secondary

0/75

Chemistry — Second Secondary 2026/2027

0/47
Quiz

Question bank: Chapter 1 — Chemical Calculation

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 6
Start Quiz
1.
In the International System of Units, the amount of a substance is measured in
gram
mole
litre
kelvin
2.
The number of particles in one mole of any substance is
6.02 × 1022
22.4 × 1023
6.02 × 1023
6.02 × 1024
3.
The number of hydrogen atoms in 1 mol of H₂ molecules is
6.02 × 1023
3.01 × 1023
1.806 × 1024
12.04 × 1023
4.
The number of molecules in 0.1 mol of any molecular substance is
6.02 × 1022
6.02 × 1024
6.02 × 1021
0.1 × 1024
5.
The number of moles in 5.6 L of a gas at STP is
0.25
0.5
1
2.5
6.
Which pair of compounds has the same empirical formula?
CO and CO₂
C₂H₄ and C₃H₆
H₂O and H₂O₂
NO and NO₂
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6