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. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App

1. Which of the following are the most and the least electronegative elements in the periodic table?

[A] Fluorine and Caesium
[B] Hydrogen and Helium
[C] Carbon and Oxygen
[D] Chlorine and Fluorine

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2. Which of the following is not a correct statement about Bitumen?

[A] It’s a mixture of highly condensed polycyclic aromatic compounds
[B] Its is soluble in Carbon Disulphide
[C] SARA analysis is used to determine bitumen chemistry
[D] All of above are correct statements

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3. Which among the following is the correct set of chemical formulae of Chile Saltpetre, Saltpetre and Quick Lime?

[A] KNO3, NaNO3, CaO
[B] NaNO3, KNO3, Ca(OH)2
[C] Na(OH)2, KOH, CaO
[D] NaNO3, KNO3, CaO

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4. After a nuclear disaster, the Strontium-90 becomes an health issue of great concern. What is the major concern about this particular isotope?

[A] Strontium-90 gets deposited in the Red Blood Cells and causes Blood Cancer
[B] Strontium-90 gets deposited in the Liver cells and causes Liver Cirrhosis
[C] Strontium-90 gets deposited in bones and bone marrow and causes cancer
[D] None of the above is a correct statement

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5. Consider the following:

  1. Atomic number
  2. Atomic mass
  3. Number of protons
  4. Number of neutrons

Which among the above is / are same for each of C-12, C-13 and C-14?

[A] 1 & 3
[B] 2 & 4
[C] 2 & 3
[D] 1 & 4

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6. Which of the following can be used to treat alkali soils?
1. Pyrite
2. Gypsusm
3. Organic Manure
Select the correct option from the codes given below:

[A] 1 & 2
[B] 2 & 3
[C] 1, 2 & 3
[D] None of them

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7. Consider the following chemicals:

  1. Copper sulfate
  2. Ozone
  3. Hydrogen peroxide
  4. Fluoride

Which of the above are used in chemical treatment process of drinking water?

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1, 2 & 3
[D] 1, 2, 3 & 4

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8. Which of the following is / are correct statements?

  1. The carbon content in Cast iron is less than that in Pig Iron
  2. Wrought iron has lower carbon content than both the Cast Iron and Pig Iron

Select the correct option from the codes given below:

[A] Only 1 is correct
[B] Only 2 is correct
[C] Both 1 & 2 are correct
[D] Neither 1 nor 2 is correct

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9. Which of the following get corroded by open air due to oxidation?

  1. Iron
  2. Copper
  3. Zinc
  4. Aluminium

Select the correct option from the codes given below:

[A] Only 1 & 2
[B] Only 2 & 3
[C] Only 1, 2 & 3
[D] 1, 2, 3 & 4

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10. 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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