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

1. A Gold Ring which is 50% pure. Its purity can be alternatively shown as __:

[A] 18 Carat
[B] 18 Karat
[C] 12 Carat
[D] 12 Karat

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2. 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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3. Which among the following is a Noble Gas?

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

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4. Which among the following is popularly called Hypo?

[A] Silver Bromide
[B] Silver nitrate
[C] Sodium thiosulphate
[D] Sodium phosphate

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5. 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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6. Which among the following is the correct decreasing of bio elements in Human Body?

[A] oxygen, hydrogen, Carbon, nitrogen, calcium, and phosphorus
[B] oxygen, carbon, nitrogen, hydrogen, calcium, and phosphorus
[C] oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus
[D] carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus

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7. The aqueous solution of which among the following acids is called Vinegar? 

[A] Oxalic acid
[B] Citric acid
[C] Acetic acid
[D] Hydrochloric acid

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8. 2,4-D, which is sold as a weed killer of the broad-leaved weeds is a synthetic version of __: 

[A] Auxin Hormone
[B] Cytokinin Hormone
[C] Xylitol
[D] None of them

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9. “Atoms can neither be created nor destroyed.” This principle was given by __?

[A] Avogadro
[B] Dalton
[C] Rutherford
[D] Niels Bohr

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10. What happens to the weight of Iron, when it rusts?

[A] Increases for long time
[B] Decreases then increases
[C] Increases then decreases
[D] Remains the same

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