Q1 · medium · AI-verified
Which of the following metals is stored under kerosene to prevent its reaction with air and water?
- Potassium
- Magnesium
- Calcium
- Sodium
Q2 · easy · AI-verified
Which of the following is the best conductor of electricity among metals?
- Silver
- Copper
- Aluminium
- Gold
Q3 · medium · AI-verified
When iron reacts with dilute sulphuric acid, which gas is produced?
- Carbon dioxide
- Oxygen
- Hydrogen
- Sulphur dioxide
Q4 · easy · AI-verified
Which non-metal is a good conductor of electricity?
- Sulphur
- Phosphorus
- Iodine
- Graphite
Q5 · medium · AI-verified
Which of the following is the correct order of reactivity series (most reactive to least reactive)?
- K > Ca > Na > Mg > Al > Zn > Fe > Cu
- K > Na > Ca > Mg > Al > Zn > Fe > Cu
- Na > K > Ca > Mg > Al > Zn > Fe > Cu
- K > Na > Mg > Ca > Al > Fe > Zn > Cu