| 1 |
Which particle of atom has a positive charge:
|
Proton <br>
Neutron <br>
Electrons<br>
None of these <br>
|
| 2 |
What the particles of an atom are?
|
Neutron, electron, and Proton <br>
Photon and electron <br>
Photon, electron, and neutron <br>
Proton and electron <br>
|
| 3 |
Which of the following contains high content of lead?
|
Low octane fuel <br>
High octane fuel <br>
Cooking gas <br>
Coal <br>
|
| 4 |
Uranium eventually decays into a stable isotope of?
|
Lead <br>
Polonium <br>
Thorium <br>
Radium <br>
|
| 5 |
Rusting of lion requires:
|
Oxygen only <br>
Oxygen and carbon dioxide <br>
Oxygen and water <br>
Carbon dioxide only <br>
|
| 6 |
A balloon filed with helium rises in air because:
|
Helium pushes down on the air below the balloon <br>
The balloon is weightless<br>
Air exerts an upward force on the balloon<br>
Helium is less dense than air <br>
|
| 7 |
Which one of the following the softest?
|
Iron <br>
Lithium <br>
Silicon <br>
Sodium <br>
|
| 8 |
Which one of the following is used in the preparation of antiseptic solution?
|
Iodine <br>
Iodine <br>
Potassium Chloride <br>
Potassium nitrate <br>
|
| 9 |
Which gas is used for converting vegetable oils into saturated fats?
|
H<sub>2</sub>
O<sub>2</sub>
SI2<sub>a</sub>
SO<sub>2</sub><br>
|
| 10 |
Which of these one substances contains no oxygen?
|
Cryolite <br>
Bauxite <br>
Dolomite <br>
Epson salt <br>
|
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