| 1 |
KMnO4 can be used as a/an?
|
Fertiliser <br>
insecticide <br>
disinfectant <br>
pesticide<br>
|
| 2 |
When water itself combines chemically with some element or mineral it is called:
|
Carbonation<br>
Oxidation<br>
Desilication<br>
Hydration<br>
|
| 3 |
Acute lead poisoning is also known as
|
Byssinosis <br>
neuralgia <br>
Itai-Itai <br>
Plumbism <br>
|
| 4 |
Which one of the following is used as an explosive?
|
Nitroglycerine<br>
Phosphorus trichloride<br>
Graphite<br>
mercuric oxide<br>
|
| 5 |
Which one among the following methods is not effective in removing arsenic form contaminated ground water?
|
Boiling<br>
Reverse osmosis<br>
Ton exchange<br>
Coagulation-adsorption<br>
|
| 6 |
Which of the following statements about diamond are correct?
|
it is used as a gem in jewellery because of its ability to reflect light<br>
it is used for cutting glass, marble stones and other hard materials <br>
it is used for drilling of rocks<br>
All are correct<br>
|
| 7 |
Rain water collected after 30 to 40 minutes of raining is not suitable for drinking because it
|
Contains dissolved toxic chemicals<br>
Contain bacteria and dirt <br>
is deficient in minerals <br>
is acidic<br>
|
| 8 |
When item of jewellery made of metals such as copper r nicker are placed in a solution having a salt of gold, a thin film of gold is deposited by:
|
passing an electric current<br>
Cooling to below 0 degree C<br>
Heating above 100 degree C<br>
Just keeping it for10 minutes<br>
|
| 9 |
Dead organs are generally stored in formalin. Formalin is:
|
Aqueous formaldehyde <br>
Aqueous ferrous sulphate<br>
Aqueous formic acid<br>
Aqueous ferric alum<br>
|
| 10 |
Which one among the following substances evolves heat when dissolved in water?
|
potassium nitrate<br>
Glucose<br>
Sodium chloride <br>
Calcium oxide<br>
|
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