721. During the collapsing of channel paper, the zenith structure point of about:
A. 800
B. 700
C. 600
D. 400
722. By using the fluted filter paper, the rate of filtration is:
A. Increased
B. Decreased
C. Filtration is constant
D. Having no effect
723. Gooch crucible is used for the filtration of precipitates having:
A. High solubility
B. High concentration
C. High ignition temperature
D. Low temperature
724. Gooch crucible used to filter the solution of:
A. H2SO4
B. HCl
C. KMnO4
D. Both B and C
725. Which one is the property of an ideal solvent?
A. Should be expensive
B. It should react chemically with the solute
C. Impurities should crystallize along with the solute
D. Should be safe to use
726. Which one is not usually used for crystallization?
A. Acetone
B. Acetic acid
C. Sulphuric acid
D. Chloroform
727. If the solvent is inflammable for heating purpose we use:
A. Ice bath
B. Water bath
C. Wire Gauze
D. Thermostat
728. Methane is slightly soluble in water due to its?
(A) Ionic Nature
B. Non-polar Nature
(C) Polar Nature
(D) Non-symmetric Nature
729. Oxime is also known as?
(A) Amino Benzene
B. Formaldehyde Amine
(C) Cyanohydrin
(D) None of the above
730. Which type of metal salts are preferred for performing flame tests?
A. Chlorides
(B) Hydroxides
(C) Fluorides
(D) Carbonates
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