Copper is a divalent metal. The value of its electrochemical equivalent is 3.29 × 10-4 g. Its atomic mass is
31.74 g
63.5 g
126.9 g
15.87 g
B.
63.5 g
Electrochemical equivalent, Z =
or, 3.29 × 10-4 =
Atomic mass = 2 × E [ Cu is divalent]
= 2 × 31.74 = 63.49 gm
In ...... process, work is done at the expense of internal energy.
isothermal
isochoric
adiabatic
isobaric
The standard reduction potential for Mg2+ /Mg is - 2.37 V and for Cu2+ /Cu is 0.337. The E for the following reaction is
Mg + Cu2+ → Mg2+ + Cu
+2.03 V
-2.03 V
-2.7 V
+2.7 V
Which is a correct integrated rate equation?
- d (a - x) = kdt
All are integrated rate equations
For which order reaction, the unit of rate constant is time-1?
Zero order
First order
Second order
Third order
The number of electrons required to reduce 4.5 × 10-5 of Al is
1.03 × 1018
3.01 × 1018
4.95 × 1026
7.31 × 1020
Maximum depression in freezing point is caused by
potassium chloride
sodium sulphate
magnesium sulphate
magnesium carbonate
Which of the following is not a colligative property?
Elevation in boiling point
Lowering of vapour pressure
Osmotic pressure
Freezing point