Inventions-General Knowledge questions and answers

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inventions general knowledge questions

Inventions-General Knowledge questions and answers

21. The blooding paper absorbs liquids because

A. It is white
B. It has got small pores
C. An absorbing chemical is mixed
D. None of the above




Answer:B

22. The instrument useful for the study of germs is

A. Periscope
B. Cardiograph
C. Microscope
D. Stethoscope




Answer:C

23. Lactometer is used to determine

A. Purity of petrol
B. Hydrogen in water
C. Purity of milk
D. None of these




Answer:C

24. Numismatics is

A. Study of coins
B. Study of stamps
C. Study of numbers
D. Study of butterflies




Answer:A

25. Crude petroleum is refined by the use of

A. Citric acid
B. Bleaching powder
C. Sulphuric acid
D. Hydrochloric acid




Answer:C

26. Penicillin was invented by Fleming in the year

A. 1842
B. 1929
C. 1945
D. 1951




Answer:B

27. Fax machine was invented by

A. Daimler
B. Dewar
C. Bain
D. None of these




Answer:C

28. Crescograph is an instrument to record

A. age of earth
B. plant growth
C. the age of star
D. none of these




Answer:B

29. The most abundant element on the earth crust is

A. calcium
B. aluminium
C. silicon
D. oxygen




Answer:D

30. Deficiency of iodine cause

A. fever
B. thyroid malfunction
C. indigestion
D. skin disease




Answer:B

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 These questions are useful for any competitive exam like IAS, Bank PO, SSC CGL, RAS, CDS, UPSC exams, and all state-related exams. You can attempt them for fun too.

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    Rajesh Bhatia

    A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.

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