GENERAL KNOWLEDGE | QUIZ | CHEMISTRY | 10 | QUESTIONS BASED ON CHEMISTRY

DIRECTIONS : Questions based on Chemistry.

46.     What are Rubies and Sapphires chemically known as
      A.  silicon dioxide
      B.  aluminium oxide
      C.  lead tetra oxide
      D.  boron nitride
 Ans: B.

47.     Acid rain contains high levels of
      A.  oxalic acid
      B.  acetic acid
      C.  sulphuric and nitric acids
      D.  carbolic acid
 Ans: D.

48.     Talc contains which one of the following ?
      A.  zinc,calcium,oxygen
      B.  calcium,oxygen,tin
      C.  magnesium,silicon,oxygen
      D.  zinc,tin,sulphur
 Ans: C.

49.     Which one of the following substances is made up of only one type of atoms?
      A.  water
      B.  hydrogen
      C.  milk
      D.  air
 Ans: B.

50.     Which one of the following is used as a mordant in dyeing and tanning indusrty?
      A.  Magnesium oxide
      B.  magnesium carbonate
      C.  magnesium chloride
      D.  magnesium sulphate
Ans: D.