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

51. What is the direction of current in a galvanic cell?

[A] same as the direction of electrons
[B] opposite to the direction of electrons
[C] Cant be determined
[D] None of the above

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52. What do we call the cell potential when no current is drawn through the galvanic cell?

[A] Zero potential
[B] E.M.F
[C] Equilibrium potential
[D] None of the above

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53. What do we call the molar conductivity when the concentration approaches zero?

[A] Reacting molar conductivity
[B] Zero level molar conductivity
[C] Limiting molar conductivity
[D] Ideal molar conductivity

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54. Which of the following is not a weak electrolyte?

[A] Acetic acid
[B] Carbonic acid
[C] Potassium Hydroxide
[D] All of the above

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55. What happens to the molar conductivity of a weak electrolyte in case of dilution?

[A] No change
[B] increases slowly
[C] increases steeply
[D] decreases slowly

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56. Which of these is also known as isobutane?

[A] 2-Methylpropane
[B] 1-Methylpropane
[C] 3-Methylpropane
[D] Butane

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57. Which of the following is formed when an acid reacts with an alcohol?

[A] Ketones
[B] Esters
[C] Aldehydes
[D] Alkynes

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58. Choose the correct statement about Oxalic acid:

[A] It is weaker than acetic acid
[B] Its condensed chemical formula is HOOCCOOH
[C] Both a and b
[D] None

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59. What do we get when we pass phenol vapours over zinc dust?

[A] Methane
[B] Ethene
[C] Toluene
[D] Benzene

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60. Which of these alkanes has higher boiling point?

[A] Butane
[B] Methane
[C] Ethane
[D] Hexane

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