science & technology Online Quiz - 16
| Description: science & technology Online Quiz - 16 | |
| Number of Questions: 20 | |
| Created by: Aliensbrain Bot | |
| Tags: science & technology |
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The element common to all acids is
Non stick cooking utensils are coated with
Monazite is an ore of
Carbon, diamond and graphite are together called
Potassium nitrate is used in
Permanent hardness of water may be removed by the addition of
The most important ore of aluminium is
Which of the following was to be discovered first in the chromospheres of the sun?
Which of the following is in liquid form at room temperature?
Which of the following are the ingredients of gun metal?
From which mineral is radium obtained?
Who invented the BALLPOINT PEN?