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

31. Iron filings can be separated from a heterogenous mixture using the technique of:

[A] Sublimation
[B] Magnetization
[C] Sedimentation
[D] Evaporation

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32. The strongest oxidizing agent among the following is:

[A] Chlorine
[B] Iodine
[C] Fluorine
[D] Oxygen

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33. Which among the following will be a negative ion?

[A] If it has more electrons than protons
[B] If it has more electrons than neutrons
[C] If it has more protons than electrons
[D] If it has more protons than neutrons

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34. Soda water has a pH value ______:

[A] >7
[B] <7
[C] 7
[D] >14

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35. Heating of rubber with Sulphur is known as _____:

[A] Galvanisation
[B] Sulphonation
[C] Bessemerisation
[D] Vulcanisation

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36. A battery converts which energy to electrical energy?

[A] mechanical
[B] chemical
[C] light
[D] heat

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37. Which one out of the following helps in burning?

[A] Oxygen
[B] Carbon monoxide
[C] Nitrogen
[D] Carbon dioxide

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38. Which of the following is not a greenhouse gas?

[A] Water vapour
[B] O2
[C] O3
[D] CO2

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39. The most abundant metal in the Earth’s crust is:

[A] zinc
[B] copper
[C] aluminium
[D] iron

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40. Which one of the following non-metals shows allotropy in the liquid state?

[A] Carbon
[B] Sulphur
[C] Phosphorous
[D] Bromine

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