scientist, discoveries & inventions MCQ section 4 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general awareness mcq - 4 EXERCISES
The following question based on scientist, discoveries & inventions topic of general awareness mcq
(a) Punched card
(b) Analytical engine
(c) Tabulating machine
(d) Arithmetic engine
The correct answers to the above question in:
Answer: (b)
The Analytical Engine was a proposed mechanical general-purpose computer designed by English mathematician Charles Babbage. It was first described in 1837 as the successor to Babbage's Difference Engine, a design for a mechanical computer.
The Analytical Engine incorporated an arithmetic logic unit, control flow in the form of conditional branching and loops, and integrated memory, making it the first design for a general-purpose computer that could be described in modern terms as Turing-complete.
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Read more scientist discoveries and inventions Based General Awareness Questions and Answers
Question : 1
Radio activity was discovered by :
a) Curie
b) Becqueral
c) Rutherford
d) Soddy
Answer »Answer: (b)
French physicist Henri Becquerel discovered radioactivity by accident in 1896 when a piece of uranium left in a dark desk drawer made an image on photographic plates.
The husband and wife team of Pierre and Marie Curie became interested in Becquerel’s discovery. While experimenting with their own uranium-containing ore, they came up with the term “radioactivity” to describe the spontaneous emissions that they studied.
Question : 2
Match List-I with List-II and select the correct answer using the code given below the lists.
| List I | List II |
| A. Dr Raja Ramanna | 1. Plant Chemistry |
| B. Dr M.S. Swaminathan | 2. Nuclear Physics |
| C. Prof. U.R. Rao | 3. Thermodynamics and astrophysics |
| D. Prof. Meghnad Saha | 4. Space research |
| 5. Agricultural science |
a) 2 5 4 3
b) 2 1 4 3
c) 3 5 2 1
d) 2 1 4 3
Answer »Answer: (a)
Question : 3
The National Science Day is observed on February 28 every year to commemorate
a) The successful launch of ASLV
b) Homi J. Bhabha’s birthday
c) Raman-effect day
d) The launch of the first artificial satellite Aryabhatta
Answer »Answer: (c)
Question : 4
The purity of Milk is determined by
a) Thermometer
b) Hydrometer
c) Stalagmometer
d) Lactometer
Answer »Answer: (d)
Lactometer is used to check the purity of milk. The specific gravity of milk does not give a conclusive indication of its composition since milk contains a variety of substances that are either heavier or lighter than water.
The device works on the principle of Archimedes’s principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced.
Question : 5
Who among the following is the inventor of ‘X’ rays?
a) Maxwell
b) Torricelli
c) Rutherford
d) Roentgen
Answer »Answer: (d)
Question : 6
Scientist Albert Einstein is famous for
a) Planting first Nuclear Reactor
b) The prediction of the existence of neutrons
c) The interpretation of atomic structure of hydrogen
d) The photoelectric effect
Answer »Answer: (d)
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