| 1 |
The gas used for artificial ripening of green fruit is
|
ethane<br>
ethylene<br>
carbon dioxide <br>
oxytocin<br>
|
| 2 |
Iodine can be separated from a mixture of iodine and potassium chloride by
|
Distillation<br>
Filtration<br>
Sedimentation <br>
Sublimation<br>
|
| 3 |
Which metal i non toxic in nature
|
Chromium <br>
Gold <br>
Cadmium <br>
Cobalt<br>
|
| 4 |
The gas that usually causes explosion in coal mines is
|
hydrogen<br>
air<br>
carbon monoxide<br>
methane<br>
|
| 5 |
The chemical behavior of an atom depends upon
|
the number of protons id its nucleus<br>
the number of neutrons in the nucleus<br>
the number of electrons orbiting around the nucleus<br>
the number of electron orbiting around<br>
|
| 6 |
A powerful eye irritant present in smog is
|
Nitric oxide<br>
Sulphar dioxide <br>
Peroxyacetly nitrate <br>
Carbon dioxide<br>
|
| 7 |
First organic chemical to be synthesized in laboratory-
|
Phosphoric acid<br>
Oxalic acid <br>
Urea <br>
Citric acid<br>
|
| 8 |
Which one is an organic acid
|
Critic <br>
Sulphuric<br>
Nitric <br>
Phosphoric<br>
|
| 9 |
petrol contains- |
carbon, oxygen
Carbon, Hydrogen
Hydrogen, Oxygen
Nitrogen, Oxygen
|
| 10 |
The Chemical symbol of sodium is |
S
So
Na
K
|
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