SCIENCE QUESTIONS FOR COMPETITIVE EXAMS-4(CDS,SSC,BANK,UPSC,GPSC,RAILWAY etc.)

Hello friends, today we are going to learn some science questions for competitive exams and I hope you would like this stuff. If you like this post then please don’t forget to share with your friends.

[1]How many chromosomes are there in human body?

ANS-46 (23 pairs, 22 pairs autosomes+1 pair sex chromosomes).

[2]What is the full form of CTR?

ANS-Cathode Ray Tube.

[3]Who did give black-hole theory?

ANS-Subrahmanyam Chandrasekhar.

[4]Who did discover the penicillin?

ANS-Alexander Fleming.

[5]Who did discover the insulin?

ANS-Frederick Banting and Charles H. Best (Canada).

[6]Who did discover that mosquito is caused malaria?

ANS-Ronald Ross (British).

[7]What metal is used as a filament in an electric bulb?

ANS-Tungsten.

[8]Who did discover vaccine of smallpox (chickenpox)?

ANS-Edward Jenner.

[9]Who did discover vaccine of Rabies?

ANS-Louis Pasteur.

[10]What is the name of the mosquito that causes malaria?

ANS-Female Anopheles.

[11]Who did find oxygen?

ANS-John Boynton Priestley.

[12]Who did find nitrogen?

ANS-Daniel Rutherford.

[13]Which gas is used in electric bulb?

ANS-Nitrogen or Argon.

[14]Which gas is used to fill in balloons?

ANS-Helium.

[15]What is the scientific name of water?

ANS-Dihydrogen oxide

[16]What is the scientific name of salt?

ANS-Sodium chloride (NaCl).

[17]What is the scientific name of washing soda?

ANS-Sodium carbonate (Na2CO3).

[18]What is the scientific name of baking soda?

ANS-Sodium hydrogen carbonate (NaHCO3).

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