J.J. Thomson discovered the electron using: MCQ with Answer and Explanation

Question
J.J. Thomson discovered the electron using:
A. Alpha scattering experiment
B. Gold foil experiment
C. Cathode ray tube experiment
D. Oil drop experiment
Answer: Option C
Solution (By JKExamLibrary)
J.J. Thomson discovered the electron in 1897 using a cathode ray tube. He showed that cathode rays were composed of negatively charged particles (electrons) that were much lighter than atoms and were a fundamental part of all matter, leading to his plum pudding model.
This question belongs to: Science chemistry

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Practice More chemistry Questions

Question #1
In an electrolytic cell, oxidation occurs at the:
A. Electrolyte
B. Salt bridge
C. Cathode
D. Anode
Discuss

Correct Answer: Option D

Explanation:
In any electrochemical cell, the anode is defined as the electrode where oxidation (loss of electrons) takes place, and the cathode is where reduction (gain of electrons) occurs. In an electrolytic cell, the anode is positively charged, attracting anions which then lose electrons.
This question belongs to: Science chemistry
Question #2
Which of the following is a renewable fuel source?
A. Biofuel
B. Coal
C. Petroleum
D. Natural gas
Discuss

Correct Answer: Option A

Explanation:
Biofuels like ethanol (from sugarcane), biodiesel (from plant oils), and biogas (from organic waste) are renewable as they can be replenished within a human lifespan. Coal, petroleum, and natural gas are fossil fuels, formed over millions of years, and are non-renewable. Using renewable fuels helps reduce greenhouse gas emissions. Another renewable fuel is hydrogen produced from water electrolysis using solar power.
This question belongs to: Science chemistry
Question #3
The technique used to separate colors in a dye is:
A. Centrifugation
B. Chromatography
C. Distillation
D. Filtration
Discuss

Correct Answer: Option B

Explanation:
Chromatography separates components of a mixture based on differential affinities between a stationary phase and a mobile phase. In paper chromatography, dyes separate due to different rates of movement. Distillation is for liquids, centrifugation for density-based separation, filtration for solids from liquids. Chromatography is used in forensics, drug testing, and food coloring analysis.
This question belongs to: Science chemistry
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