Who discovered the true nature of combustion as an oxidation process, disproving the phlogiston theory? MCQ with Answer and Explanation
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Question #1
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Who discovered the specific mathematical formula detailing gas density variation relative to molecular weight, known as the diffusion law?
Correct Answer: Option A
Explanation:
Graham's Law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular mass.
Graham's Law states that the rate of effusion or diffusion of a gas is inversely proportional to the square root of its molecular mass.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #2
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The invention of the common electric toaster mechanism was achieved using nichrome wire by whom?
Correct Answer: Option A
Explanation:
Albert Marsh patented Nichrome resistance wire alloy, which enabled safe high-heat cycling within appliances like toasters.
Albert Marsh patented Nichrome resistance wire alloy, which enabled safe high-heat cycling within appliances like toasters.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
Question #3
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The invention of the common mechanical office device known as the copy mimeograph machine was patented by whom?
Correct Answer: Option A
Explanation:
Edison patented the stencil duplicating device in 1876, which Albert Dick later refined into the widespread commercial mimeograph.
Edison patented the stencil duplicating device in 1876, which Albert Dick later refined into the widespread commercial mimeograph.
This question belongs to:
Static General Knowledge
Inventions and Discoveries
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