In electroplating, the metal to be plated is made the: MCQ with Answer and Explanation

In electroplating, the metal to be plated is made the:
A. Anode
B. Salt bridge
C. Electrolyte
D. Cathode
Answer: Option D
Solution (By JKSSB Mock Tests)
The object to be plated is connected to the negative terminal (cathode). Metal ions from the electrolyte are reduced and deposited on the cathode. The anode is usually the plating metal, which dissolves to replenish the electrolyte. For example, in silver plating, the article is the cathode and silver bar is the anode.

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Practice More chemistry Questions

Question #1
Which of the following causes ozone depletion?
A. SO₂
B. N₂
C. CO₂
D. CFCs

Correct Answer: Option D


Explanation:
Chlorofluorocarbons (CFCs) release chlorine atoms in stratosphere which catalytically destroy ozone. CO₂ causes global warming, SO₂ acid rain, N₂ is inert. Ozone hole over Antarctica is due to CFCs.

This question belongs to: Science chemistry
Question #2
The ozone layer protects us from:
A. Ultraviolet radiation
B. Radio waves
C. Visible light
D. Infrared radiation

Correct Answer: Option A


Explanation:
The stratospheric ozone layer absorbs the majority of the sun's harmful ultraviolet (UV-B and UV-C) radiation, preventing it from reaching Earth's surface. UV can cause skin cancer, cataracts, and damage to ecosystems. Ozone depletion is caused by CFCs (chlorofluorocarbons). Infrared is associated with heat, visible light is mostly harmless, radio waves are not absorbed by ozone.

This question belongs to: Science chemistry
Question #3
Which scientist proposed the 'Plum Pudding' model of the atom?
A. J.J. Thomson
B. John Dalton
C. Ernest Rutherford
D. Niels Bohr

Correct Answer: Option A


Explanation:
J.J. Thomson proposed the 'Plum Pudding' model in 1904 after discovering the electron. He envisioned the atom as a sphere of positive charge with negatively charged electrons embedded within it, like plums in a pudding. This was later disproved by Rutherford's gold foil experiment.

This question belongs to: Science chemistry