1131. 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

1132. 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

1133. 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

1134. The reference calomel electrode is made from which of the following ?

A. ZnCl2
B. CuSO4
C. Hg2cl2 *
D. Hgcl2

1135. 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

1136. 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.

1137. A cell constant is generally found by measuring the conductivity of aqueous solution of :

A. BaCl2
B. KCI *
C. Nacl
D. Mgcl2

1138. A solution of sodium sulphate was electrolysed using some inert electrodes the products at the electrodes are :

A. O2,H2 *
b. O2,Na
C. O2,SO2
D. O2, S2O

1139. The monovalent metal is deposited after 10 minutes of running a current of 9.65 amperes. The metal’s atomic mass is:

A. 10
B. 50 *
C. 30
D. 96

1140. How many grams of copper can be released in a copper sulfate solution by the same current flowing for the same amount of time? A certain current releases 0.5 grams of hydrogen in 2H.

A. 12.7 gm *
B. 15.9 gm
C. 31.8 gm
D. 63.5 gm