Electrochemistry Test

Result

Electrochemistry Test - 14

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

Stainless steel does not rust because

A
chromium and nickel combine with iron

B
chromium forms an oxide layer and protects iron from rusting

C
nickel present in it, does not rust

D
iron forms a hard chemical compound with chromium present in it
Question 2
4 / -1

Corrosion of iron is essentially an electrochemical phenomenon where the cell reactions are

A
Fe is oxidised to Fe²⁺ and dissolved oxygen in water is reduced to OH^-

B
Fe is oxidised to Fe³⁺ and H₂O is reduced to O^2-₂

C
Fe is oxidised to Fe²⁺ and H₂O is reduced to O^-₂

D
Fe is oxidised to Fe²⁺ and H₂O is reduced to O₂

Solution
Question 3
4 / -1

When electric current is passed through acidified water for 1930 s, 1120 mL, of H₂ gas is collected (at STP) at the cathode. What is the current passed in amperes?

A
0.05

B
0.50

C
5.0

D
50

Solution
Question 4
4 / -1

Of the following metals that cannot be obtained by electrolysis of the aqueous solution of their salts are

A
Ag and Mg

B
Ag and Al

C
Mg and Al

D
Cu and Cr.
Question 5
4 / -1

The equivalent conductivity of a solution containing 2.54g of CuSO₄ per L is 91.0 ω^-1 cm² eq^-1. Its conductivity would be

A
2.9 × 10^-3 Ω^-1 cm^-1

B
1.8 × 10^-2 Ω^-1 cm^-1

C
2.4 × 10^-4 Ω^-1 cm^-1

D
3.6 × 10^-3 Ω^-1 cm^-1
Question 6
4 / -1

A
275.6, 091

B
275.6, 9.1

C
266.6, 9.6

D
30, 84

Solution
Question 7
4 / -1

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?

A
K

B
Rb

C
Li

D
Na
Question 8
4 / -1

The ionic conductance of Ba²⁺ and Cl^- are respectively 127 and 76Ω^- cm² as infinite dilution. The equivalent conductance (in Ω^-1 cm²) of BaCl₂ at infinite dilution will be

A
330

B
203

C
139.5

D
51

Solution
Question 9
4 / -1

AgNO₃ (aq) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of conductance (˄) versus the volume of AgNO₃ is

A
(I)

B
(II)

C
(III)

D
(IV)
Question 10
4 / -1

By diluting a weak electrolyte, specific conductivity (K_C) and equivalent conductivity (λ_C) change as

A
Both increase

B
K_C increases, λ_C decreases

C
K_C decreases, λ_C increases

D
Both decreases