Question : Who discovered 'Portland cement'?
Option 1: Michael Faraday
Option 2: Guglielmo Marconi
Option 3: Joseph Aspdin
Option 4: Isaac Newton
Correct Answer: Joseph Aspdin
Solution : The correct option is Joseph Aspdin.
In 1824, Aspdin invented a method for manufacturing hydraulic cement by burning a finely crushed powder of limestone and clay at high temperatures. He called this cement "Portland" because it looked like the high-quality construction stones found in Portland, England.
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Question : Who gave the 'Law of Gravitation'?
Option 3: James Watt
Question : Who invented the electric motor?
Question : Who among the following made the first observation on Platinum as a catalyst and discovered similar triads of elements that led to the development of the Periodic Table of elements?
Option 1: Dmitri Mendeleev
Option 2: Hans Christian Oersted
Option 3: Johann Wolfgang Dobereiner
Option 4: Michael Faraday
Question : Which of the following scientists provided the Law of Octaves?
Option 1: Galileo Galilei
Option 2: John Newlands
Option 3: Michael Faraday
Option 4: Marie Curie
Question : Which physical theory explains the generation of thrust by rocket engines, jet engines and deflating balloons?
Option 1: Newton's laws of motion
Option 2: Exclusion principle
Option 3: Faraday's laws of electromagnetic induction
Option 4: Laws of thermodynamics
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