| 1 |
Which of the following gasses is used in fire extinguishers?
|
carbon monoxide<br>
carbon dioxide <br>
nitrogen oxide <br>
sulpher dioxide <br>
|
| 2 |
Which of the primary component of natural gas?
|
Methane<br>
Butane <br>
Propane <br>
Ethane<br>
|
| 3 |
Atomic number is equal to
|
number of protons <br>
number of electrons<br>
number of neutron<br>
total number of protons and natural<br>
|
| 4 |
Globing warming is due to increased production of all the following , except
|
Methane<br>
Ethane<br>
Sulpher dioxide<br>
Carbon dioxide <br>
|
| 5 |
Which of the following gas is used in cigarette
|
Propane <br>
Butane<br>
Methane<br>
Ethane<br>
|
| 6 |
A hydrogen-inflated polythene balloon is released form the surface of the earth, As the balloon raises to an altitude up in the atmosphere, ti will
|
decrease in aize<br>
flatten it a disc like shape <br>
increase in size <br>
maintain the same size and shape <br>
|
| 7 |
Regarding the atom of a chemical element, the magnetic quantum number refers to
|
orientation<br>
shape <br>
size <br>
spin<br>
|
| 8 |
Which of the following is produced during the formation of photochemical smog?
|
Hydrocarbons <br>
nitrogen oxides <br>
ozone<br>
methane<br>
|
| 9 |
Which of he following elements is not present in stainless steel?
|
iron <br>
trungsten<br>
chromium <br>
nickel<br>
|
| 10 |
The most abundant element in the ea5rth;s crust is
|
Silicon<br>
Aliminium<br>
Nitrogen<br>
Oxygen<br>
|
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