(a)  1         2         3         4
     (b)  2         1         3         4
     (c)  3         4         1         2
     (d)  3         2         1         4
Ans: (c)
115. Match the following:
     A. Nitroglycerine        1. Anaesthetic
     B. Nitrous oxide         2. Antiseptic
     C. Potassium chloride 3. Explosive
     D. Picric acid           4. Electrolyte
          A         B         C         D
     (a)  1         3         2         4
     (b)  3         1         4         2
     (c)  2         1         4         3
     (d)  4         3         2         1
Ans: (b)
116. Match the following:
     Plastics       Used for making
     A. Melamine 1. Electric fittings
     B. Teflon      2. Cups and crockery
     C. Bakelite    3. Raincoats
     D. PVC         4. Non-stick utensils
          A         B         C         D
     (a)  2         1         4         3
     (b)  2         4         1         3
     (c)  3         2         1         4
     (d)  3         1         2         4
Ans: (b)
117. Match the following:
     Materials      Chemicals used
     A. Glass       1. Phosphorus
     B. Cement      2. Clay
     C. Matches     3. Silica
     D. Ink         4. Carbon black
                    5. Cellulose
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