General Science Questions (MCQs) for Competitive Examinations

General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.

41. Which of the following is the reason of stability of completely filled and half filled subshells?

[A] Symmetrical distribution of electrons
[B] Exchange energy
[C] Both a and b
[D] None

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42. Which of the following gas is used to prevent the chips from getting oxidised?

[A] Oxygen
[B] Nitrogen
[C] Helium
[D] Lithium

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43. What is the order of the reaction which is independent of the concentration of reactants?

[A] Zero order
[B] First order
[C] Second order
[D] Third order

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44. Which of these species will have the largest atomic size?

[A] Na
[B] Mg
[C] Mg2+
[D] K

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45. Which of the following represents the bond order in Molecular orbital theory?

[A] half the difference between the number of bonding and antibonding electrons
[B] twice the difference between the number of bonding and antibonding electrons
[C] the difference between the number of bonding and antibonding electrons
[D] the sum of the number of bonding and antibonding electrons

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46. Which of the following factors affect the electronic conductance of a metal?

[A] the nature and structure of the metal
[B] the number of valence electrons per atom
[C] temperature
[D] All of the above

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47. Which one of the following is not a Type of coal?

[A] Lignite
[B] Siderite
[C] Anthracite
[D] Peat

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48. Who gave law of conservation of mass?

[A] Dalton
[B] Boyle
[C] Lavoisier
[D] Berzelius

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49. In India, Department of Atomic Energy is in direct charge of __?

[A] President
[B] Prime Minister
[C] Minister of Science and Technology
[D] None of the above

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50. The United Nations along with which country is to co-host a climate summit on 12th December 2020?

[A] India
[B] USA
[C] United Kingdom
[D] Italy

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