General Science - Chemistry MCQs

31. Haber Process is used to produce which among the following?
[A] Potash
[B] Ammonia
[C] Urea
[D] Nitrates

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32. If a Hydrogen atom is removed from a hydrocarbon of Benzene group, the remaining residue is called _________?
[A] Alkyl
[B] Aryl
[C] Arene
[D] Azene

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33. Which among the following kinds of Chemical reactions cause the rocks turn red or yellowish?
[A] Hydration
[B] Oxidation
[C] Carbonation
[D] Exfoliation

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34. Which among the following is the unit of the scale used for measurement of the spicy heat of a chili pepper?
[A] Smith
[B] Wright
[C] Orville
[D] Scoville

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35. Every kilogram of seawater has approximately how much dissolved salts?
[A] 1 gm
[B] 0.35 gms
[C] 3.5 gms
[D] 35 gms

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36. Gypsum is added to Cement so that, _________?
[A] setting of cement can be fastened
[B] setting of cement can be slowed
[C] Cement strength can be improved
[D] Cement strength can be controlled

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37. The color “Carmine” is a shade of which among the following colors?
[A] Red
[B] Blue
[C] Yellow
[D] Green

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38. Consider the following:

  1. Copper
  2. Zinc
  3. Tin

Gun Metal is the alloy of which among the above?

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

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39. Which among the following makes Chile saltpetre different from saltpetre?
[A] Nitrate
[B] Sodium
[C] Magnesium
[D] Calcium

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40. Which among the following is “Fool’s Gold” ?
[A] Copper Sulphate
[B] Iron Sulfide
[C] Brass
[D] Silver Bromide

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