| 1 |
Concentration is process of: |
Mixting technique
Separating technique
Boiling technique
Cooling techique
|
| 2 |
Chalco-Pyrite is an ore of: |
Copper
Silver
Iron
Aluminium
|
| 3 |
the chemical formula of chalcopyrite is: |
Cu<sub>2</sub>S
CuFe<sub>2</sub>S
CuS
FeS
|
| 4 |
Concentration of copper are is carried out by process. |
Roasting
Forth floatation
Gravity sepration
Electrostatic separation
|
| 5 |
Swimming pools are cleaned by a process: |
Hydrogenation
Bromination
Chlorination
Nitration
|
| 6 |
Which of the following gas is used to destroy harmful bacteria in water. |
Iodine
Chlorine
fluorine
Bromine
|
| 7 |
Which one of the following disease causes severe diarrhea and can be fatal: |
Jaundic
Dysentery
Cholera
Typhoid
|
| 8 |
Cholera is caused by |
Protozoa
Virus
Bacteria
Fungi
|
| 9 |
Which gas is used to destroy harmful bacteria in water? |
Iodine
Chlorine
Flourine
Bromine
|
| 10 |
Vibrious cholera bacteria causes the disease |
Cholera
Diarrhea
Jaundice
Hepatitis
|
| 11 |
Which disease cause liver inflammation? |
Typhoid
Jaundice
cholera
Hepatitis
|
| 12 |
Which compound protect teeth from diseases? |
Fluorine compound
Chlorine compound
Iodine compound
Bromine compound
|
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