Question : Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives
Option 1: copper at the cathode, and oxygen at the anode
Option 2: copper at the anode, and oxygen at the cathode
Option 3: copper at the cathode, and anodes dissolve to give copper
Option 4: hydrogen at the cathode, and oxygen at the anode
New: SSC Stenographer Application Form 2024 Released
Don't Miss: Month-wise current affairs
Suggested: Upcoming government exams
Correct Answer: copper at the cathode, and oxygen at the anode
Solution : The correct option is copper at the cathode and oxygen at the anode.
Copper is deposited at the cathode and is dissolved at the anode. Consequently, the concentration of copper ions in the solution remains constant. This can be used as a method of purification of copper as only pure copper is deposited at the cathode. Bubbles of gas (oxygen) are formed and evolved at the anode.
The equation will be as follows:
(cathode) Cu+ + 2e−→ Cu (anode) Cu → Cu2+ + 2e−
Application | Eligibility | Dates | Syllabus
Question : When a spoon is to be electroplated with nickel the spoon is
Option 1: Dipped in a nickel sulphate solution
Option 2: Made anode and a pure nickel rod, the cathode
Option 3: Made of cathode and a pure nickel rod, the anode
Option 4: Coated with nickel sulphate and dried
Question : Which of the following chemicals is used as rodenticide?
Option 1: Copper sulphate
Option 2: Zinc sulphide
Option 3: Iron sulphate
Option 4: None of these
Question : Heavy water is made by ______.
Option 1: dissolving salt of heavy metals in distilled water
Option 2: repeated distillation and condensation of water
Option 3: burning Deuterium in oxygen
Option 4: by burning the heavier isotope of Oxygen and Hydrogen
Question : Which of the following has deuterium as one of its isotopes?
Option 1: Nitrogen
Option 2: Carbon
Option 3: Hydrogen
Option 4: Oxygen
Question : Which of the following is the strongest base in aqueous solution?
Option 1: Diethylamine
Option 2: Triethylamine
Option 3: Ammonia
Option 4: Ethylamine
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile