Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App

11. What is Tyndall effect?

[A] scattering of a beam of light by the particles of a suspension
[B] refraction of a beam of light by the particles of a solution
[C] scattering of a beam of light by the particles of a colloid
[D] reflection of a beam of light by the particles of a suspension

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12. Which of the following quantum number is also known as orbital angular momentum?

[A] Principal quantum number
[B] Azimuthal quantum number
[C] Magnetic quantum number
[D] Electron spin quantum number

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13. 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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14. What is the general trend for first ionisation enthalpy in a group of the periodic table as we move from top to bottom?

[A] It increases
[B] it decreases
[C] It is constant
[D] None of the above

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15. Which of the following elements has the largest atomic radii?

[A] Lithium
[B] Beryllium
[C] Boron
[D] Carbon

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16. Choose the correct statement about the covalent character of the ionic bond:

[A] It is directly proportional to the charge on the cation
[B] It is inversely proportional to the size of cation
[C] Both a and b
[D] None

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17. What can we call the carbon atom present in Methane?

[A] primary carbon atom
[B] secondary carbon atom
[C] tertiary carbon atom
[D] quaternary carbon atom

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18. Ethanoic acid is the main constituent of which of the following substances?

[A] Soap
[B] Vinegar
[C] Wine
[D] Curd

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19. Which of the following compound was used to isolate Potassium metal for the first time?

[A] Potassium oxide
[B] Potassium peroxide
[C] Potassium hydroxide
[D] Potassium superoxide

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20. What is the colour of Rhombic sulphur?

[A] Red
[B] Yellow
[C] Black
[D] Colorless

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