Who discovered the precise value of the physical constant detailing the number of structural units in one mole of material? MCQ with Answer and Explanation

Question

Who discovered the precise value of the physical constant detailing the number of structural units in one mole of material?

A. Jean Perrin

B. John Dalton

C. Max Planck

D. Amedeo Avogadro

Answer: Option A

Solution (By JKSSB Mock Tests)

While the constant is named after Avogadro, Jean Perrin calculated its exact value through experimental tracking of Brownian motion, winning a Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Inventions and Discoveries Questions

Question #1

Share Report

The cosmic microwave background radiation, confirming the Big Bang theory, was discovered by whom?

A. Albert Einstein

B. Stephen Hawking

C. Edwin Hubble

D. Arno Penzias and Robert Wilson

View Answer & Solution Discuss

Get Complete Subject PDF for Static General Knowledge

Correct Answer: Option D

Explanation:
Arno Penzias and Robert Wilson accidentally discovered cosmic microwave background radiation in 1964, winning a Nobel Prize.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

Share Report

The invention of the common mechanical device known as the modern coin-operated parking meter was patented by whom?

A. Garrett Morgan

B. Walter Hunt

C. James Ritty

D. Carl Magee

View Answer & Solution Discuss

Get Complete Subject PDF for Static General Knowledge

Correct Answer: Option D

Explanation:
Carl Magee patented the 'Park-O-Meter' in Oklahoma City in 1935 to regulate downtown vehicle traffic turnover.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3

Share Report

Who discovered that biological neural transmission passes across physical cell junctions via specialized chemical messengers, founding Neurotransmission?

A. Willem Einthoven

B. Santiago Ramón y Cajal

C. Otto Loewi and Henry Dale

D. Camillo Golgi

View Answer & Solution Discuss

Get Complete Subject PDF for Static General Knowledge

Correct Answer: Option C

Explanation:
Loewi isolated acetylcholine from frog heart tracking setups, sharing a Nobel Prize with Dale for chemical nerve impulse transmission.

This question belongs to: Static General Knowledge Inventions and Discoveries

Explore All Inventions and Discoveries MCQs