GENERAL KNOWLEDGE | QUIZ | CHEMISTRY | 3 | QUESTIONS BASED ON CHEMISTRY

DIRECTIONS : Questions based on Chemistry.

11.     Which one of the following glasses is used in bullet proof screens?
      A.  Soda glass
      B.  Pyrex glasss
      C.  Jena glass
      D.  Reinforced glass
 Ans: D.

12.     For Which one of the following is the density maximum ?
      A. Chloroform
      B. Water
      C. Benzene
      D. Ice
 Ans: B.

13.     Which substance is used to retard the setting action of cement?
      A.  CaO
      B.  AlO
      C.  CaSO.2HO
      D.  NaO + KO
 Ans: C.

14.     What is a mixture of potassium nitrate , powdered charcoal and sulphur called?
      A.  Glass
      B.  Cement
      C.  Paint
      D.  Gun Powder
 Ans: D.

15.     Which one of the following is the softest?
      A.  Iron
      B.  Aluminium
      C.  Calcium
      D.  Lithium
Ans: A.