From which mineral is radium obtained?
Rutile
Haematite
Limestone
Pitchblende
Additional Questions
|
What is laughing gas? |
Answer |
|
Actinides are the elements with atomic numbers from |
Answer |
|
The two elements that are frequently used for making transistors are |
Answer |
|
The filament of an electric bulb is made of |
Answer |
|
Diamond is an allotropic form of |
Answer |
|
In fireworks, the green flame is produced because of |
Answer |
|
Permanent hardness of water can be removed by adding |
Answer |
|
Marsh gas is |
Answer |
|
LPG consists of mainly |
Answer |
|
Air is a/an |
Answer |