General Science Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination

21. Who among the following is known to manufacture first Cyclotron?

[A] Ernest Lawrence
[B] Niels Bohr
[C] Rutherford
[D] Max Born

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22. Who among the following established that genetic code of all organisms is spelled out in three-letter words, each set of three nucleotides codes for a specific amino acid?

[A] Hargobind Khorana
[B] Barbara McClintock
[C] Theodor O. Diener
[D] Joseph L. Goldstein

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23. Which among the following is “Fool’s Gold” ?

[A] Copper Sulphate
[B] Iron Sulfide
[C] Brass
[D] Silver Bromide

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24. Which among the following is the unit of the scale used for measurement of the spicy heat of a chili pepper?

[A] Smith
[B] Wright
[C] Orville
[D] Scoville

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25. Which of the following states of matter has the weakest Intermolecular forces?

[A] Solids
[B] Liquids
[C] Gases
[D] It is same in solids, liquids and gases

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26. What is the property of matter by which a body tends to regain its original configuration after the removal of deforming force known as?

[A] Plasticity
[B] Ductility
[C] Elasticity
[D] Malleability

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27. What is the body called which does not have any tendency to recover its original configuration, on the removal of deforming force?

[A] Perfectly plastic
[B] Perfectly elastic
[C] Perfectly ductile
[D] None of the above

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28. What is the unit of Stress?

[A] N/m
[B] Kg/m
[C] Nm
[D] It has no units

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29. What is the dimensional formula of Stress?

[A] M 1 L-2 T-2
[B] M 1 L-1 T-1
[C] M 1 L1 T-3
[D] M 1 L-1 T-2

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30. What is the stress known as when there is a relative displacement between various layers of solid?

[A] Tangential
[B] Linear
[C] Lateral
[D] Longitudinal

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