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

11. Which of the following is an anti-knocking compound that has been phased out in many countries so far?

[A] Lead tetrachloride
[B] Tetra Ethyl Lead
[C] Ethyl acetate
[D] None of the above

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12. Highest percentage of nitrogen is found in which among the following fertilizers among the given options?

[A] Calcium ammonium nitrate
[B] Ammonium nitrate
[C] Calcium nitrate
[D] Urea

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13. Who among the following scientists had discovered Radium?

[A] Marie Sklodowska-Curie and Pierre Curie
[B] André-Louis Debierne
[C] Kasimir Fajans
[D] Oswald Helmuth Göhring

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14. Calcium Magnesium Silicate is commonly called as ________?

[A] Asbestos
[B] Borax
[C] Baking Soda
[D] Washing Soda

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15. Argon is the third most common gas in the Earth’s atmosphere, at 0.93%. This gas is generated due to decay of which among the following isotopes in the Earth’s crust ?

[A] K-40
[B] Ca-40
[C] Ca-48
[D] K-41

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16. Which among the following is produced when we pass chlorine into slaked lime?

[A] DDT
[B] Baking Powder
[C] Bleaching Powder
[D] Gypsum

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17. Consider the following statements:

  1. The sulphur content in sour crude oil is higher in comparison to sweet crude oil
  2. Brent crude oil is a sour crude oil
  3. Most of Brent crude oil comes from North Sea

Which among the above statements is / are correct?

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

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18. Consider the following statements:
1.’sweet’ crude is more valuable in comparison to ‘sour’ crude
2.Mumbai High crude produced by ONGC is sweet crude
Which among the above statements is / are correct?

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

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19. Which of the following chemicals is also known as lachrymatory agent or lachrymator? 

[A] Mustard Gas
[B] Tear gas
[C] Diborane
[D] Chlorine gas

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20. Which of the following laws is used as a rule to predict the solubility of gases in metals?

[A] Dalton’s Law
[B] Sievert’s law
[C] Graham’s law
[D] Henry’s law

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