661. Depression in the F.P is directly proportional to?
A. Molarity of solvent
B. Molality of solvent
C. Molality of solution
D. Molarity of solution
662. Freezing point of equimolal aqueous solutions will be minimum for?
A. Glycose
B. Urea
C. Fructose
D. NH4Cl
663. The number of moles of solute in 500 cm2, 3M solution is?
A. 1
B. 1.5
C. 3
D. 4
664. In electrolytic cells with an aqueous solution, which of the following substances—Na, Hg, SPT, and graphite—can serve as electrodes?
A. Na, Pt, and Graphite
B. Na and Hg
C. Pt and Graphite only
D. Na and S only
665. The mass deposited at the electrode is equal to when the amount of electricity passed is one faraday.
A. One gm, atomic weight
B. One gm, Equivalent weight
C. Electrochemical equivalent
D. None of the above
666. If a salt bridge is removed between the two half cells, the voltage:
A. Drops to zero
B. Does not change
C. Increases gradually
D. Increases rapidly
667. The reference calomel electrode is made from which of the following?
A. ZnCl2
B. CuSO4
C. Hg2Cl2
D. HgCl2
668. When electricity is passed through molten Al2O3 + Na3AlF6 and 13.5 gms of Al are deposited, the number of faraday must be:
A. 0.5
B. 1.0
C. 1.5
D. 2.0
669. An electrolyte:
A. Forms complex ions in solution
B. Only gives ions when electricity is passed through it.
C. Has ions even in its solid state.
D. Only gives ions when it is dissolved in water.
670. A cell constant is generally found by measuring the conductivity of the aqueous solution of:
A. BaCl2
B. KCl
C. NaCl
D. MgCl2
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