| 1 |
Atomic number of an element gives
|
the number of the electron is in its atom<br>
the number of nucleons in it s atom<br>
the weight of the atom of the element<br>
the total number of elementary particles<br>
|
| 2 |
Carbon occurs in nature in the purest forms as
|
Diamond<br>
Graphite<br>
Carbon block <br>
Coal<br>
|
| 3 |
carcinogenic chemical s are expected to cause
|
allergy <br>
tuberculosis <br>
cancer<br>
anemia <br>
|
| 4 |
Corrosion of metal occurs
|
anode<br>
cathode<br>
both anode and cathode <br>
none of the above<br>
|
| 5 |
Detergents produce lather wit hard water because
|
they are soluble in hard water<br>
they are colorless substances <br>
the calcium and magnesium salts of sulphonic acids are soluble in water<br>
they form sodium carbonate with hard water<br>
|
| 6 |
Diamond is the form of carbon
|
crystaliine<br>
amorphous <br>
chemical<br>
alkaline<br>
|
| 7 |
Distillation the reduced pressure is used for liquids which have
|
Crystalline<br>
amorphous <br>
chemical<br>
alkaline<br>
|
| 8 |
During dehydration, the substance that the body usually loses is
|
sugar<br>
sodium chloride <br>
calcium phosphate<br>
potassium chloride<br>
|
| 9 |
Elements that shown the properties of both metals and non metals are called
|
allotrope<br>
metalloids <br>
alloys <br>
colloids<br>
|
| 10 |
Enamel is
|
A hardened transparent coating of paint <br>
a glossy coating fused tot the surface of a metal, glass or pottery<br>
a king of clay mixed with pigments <br>
none of above<br>
|
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