1 |
If the solvent is inflammable for heating purpose we use |
Ice bath
Water bath
Wire gauze
Thermostat
|
2 |
Which one is not usually used for the crystallization |
Acetone
Acetic acid
Sulphuric acid
Chloroform
|
3 |
Which one is the property of an ideal solvent |
Should be expensive
It should react chemically with the solute
Impurities should crystallize along with the solute
Should be safe to use
|
4 |
Gooch crucible used to filter the solution of |
H<sub>2</sub>SO<sub>4</sub>
HCI
KMnO<sub>4</sub>
Both B & C
|
5 |
Gooch crucible is used for the filtration of precipitates having |
High solubility
High concentration
High ignition temperature
Low temperature
|
6 |
By using the fluted filter paper rate of filtration is |
Increased
Decreased
Filtration is constant
Having no effect
|
7 |
During the folding of filter paper the apex form angle of about |
80<sup>o</sup>
60<sup>o</sup>
180<sup>o</sup>
90<sup>o</sup>
|
8 |
The pore size of the filter paper depends upon |
Nature of the medium
Temperature of the medium
Size of the particles
Mass of the particles
|