| 1 |
______ is an example of ionic solids |
Diamond
Copper
Dry ice
Sodium
|
| 2 |
A chemical used in photography is? |
Sodium sulphate
Sodium sulphite
Sodium oxalate
Sodium thiosulphate
|
| 3 |
The most commonly used bleaching agent is
|
Sodium chloride<br>
Carbon dioxide<br>
Chlorine <br>
Alcohol<br>
|
| 4 |
The most malleable metal is:
|
platinum<br>
Silver <br>
Iron<br>
Gold<br>
|
| 5 |
The names of the scientist, Newlands, Mendeleev and Meyer are associate with the development of
|
Atomic structure<br>
Metallurgy<br>
periodic table of elements <br>
Discovery of elements<br>
|
| 6 |
The nuclear particles that are assumed to hold nucleons together are
|
Electrons <br>
Positrons<br>
Neutrons <br>
Mesons<br>
|
| 7 |
The purest form of iron is
|
Pig iron<br>
cast iron<br>
wrought iron<br>
stainless steel<br>
|
| 8 |
The substance that contains the maximum amount of nitrogen is
|
Urea<br>
Ammonium sulphate<br>
Ammonium Nitrate<br>
Ammonium chloride<br>
|
| 9 |
The substance the its least prone to catch and spread fire is
|
Nylon<br>
Terycot <br>
Cotton<br>
Polyester<br>
|
| 10 |
The sulphide ores of metals are concentrated:
|
Cupellation<br>
Electrolysis<br>
Forth floatation<br>
Calcinations <br>
|
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