Experimental Techniques in Chemistry - 2
1.
Basic principle of crystallization.
a) 95%
b) Fluted filter paper
c) Stem of funnel extend into receiving beaker.
d) Choice of solvent
2.
Rectified spirit.
a) Fluted filter paper
b) Stem of funnel extend into receiving beaker.
c) 95%
d) Gooch crucible.
3.
Slow cooling
a) Bigger size crystals
b) Vacuum desiccator
c) Animal Charcoal
d) Contamination of fibres of filter paper
4.
Drying of crystals by pressing, it in fold of filter paper
a) Vacuum desiccator
b) Bigger size crystals
c) Contamination of fibres of filter paper
d) CaCl
2
5.
Safe & reliable method of drying
a) CaCl
2
b) Contamination of fibres of filter paper
c) Bigger size crystals
d) Vacuum desiccator
6.
Drying agent in a desiccator
a) Animal Charcoal
b) CaCl
2
c) Contamination of fibres of filter paper
d) Vacuum desiccator
7.
Coloured impurities
a) Vacuum desiccator
b) Bigger size crystals
c) Animal Charcoal
d) Contamination of fibres of filter paper
8.
Ammonium Chloride
a) Solvent extra
b) Ether
c) Volatile product
d) Sublimation.
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