Top 1000 GK Questions for Competitive Exams
Which of the following is used as retardant in nuclear reactor?
(A) Thorium
(B) Graphite
(C) Radium
(D) Ordinary water
Correct Answer : B
The fibre of the electric bulb is formed.
(A) From copper
(B) Aluminium
(C) From lead
(D) From Tungston
Correct Answer : D
Indane gas is a mixture
(A) Butane and Hydrogen
(B) butane and oxygen
(C) Butane and Propane's
(D) Methane and oxygen
Correct Answer : C
A flat mirror has a minimum height to see a full reflection of a person.
(A) Equal to the height of the person
(B) Half of the height of a person
(C) One-fourth of the person's height
(D) Double the height of the person
Correct Answer : B
Night blindness is cause by lack of which vitamin?
(A) Vitamin A
(B) Vitamin B
(C) Vitamin C
(D) Vitamin D
Correct Answer : A
The metal that is usually extracted from sea water is
(A) Ca
(B) Na
(C) K
(D) Mg
Correct Answer : D
The metal used to recover copper from a solution of copper sulphate is
(A) Na
(B) Ag
(C) Hg
(D) Fe
Correct Answer : D
Safety fuse wire used in domestic electrical appliances is made of metal of low
(A) resistance
(B) melting point
(C) specific gravity
(D) conductance
Correct Answer : B
The instrument which uses sound waves to measure the depth of oceans is
(A) Radar
(B) Sonar
(C) Altimeter
(D) Venturimeter
Correct Answer : B
The best conductor of heat among the following is
(A) alcohol
(B) mercury
(C) ether
(D) water
Correct Answer : B
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enhttps://www.examsbook.com/top-1000-gk-questions/1410014top-1000-gk-questionsAbout author
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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