Ans: (d)
233. A non-material kind of pollution is
     (a) land pollution
     (b) air pollution
     (c) noise pollution
     (d) water pollution
Ans: (c)
234. The vitamin that is found in citrus fruits such as lemon and orange is
     (a) vitamin C
     (b) vitamin B2
     (c) vitamin A
     (d) vitamin E
Ans: (a)
235. Which of the following is not an antibiotic?
     (a) streptomycin
     (b) terramycin
     (c) aureomycin
     (d) codein
Ans: (d)
236. The hormone which absorption is increases glucose oxidation and glucose
     (a) adrenalin
     (b) thyroxin
     (c) insulin
     (d) epinephrine
Ans: (c)
237. The depletion of the ozone layer in the upper atmosphere is due to -extensive use of
     (a) dichloro-phenoxy-acetic acid
     (b) superphosphate of lime
     (c) chlorofluorocarbons (CFC)
     (d) dichloro-diphenyl-trichloro-ethane
Ans: (c)
238. Which of the following elements is not required for the healthy growth of plants?
     (a) Nitrogen
     (b) Phosphorus
     (c) Potassium
     (d) Mercury
Ans: (d)
239. Match the following:
     List-I                   List-2
     A. Analgin               1. Vitamin B2
     B. Riboflavin            2. Vitamin C
     C. Penicillin            3. Analgesic
     D. Ascorbic acid         4. Antibiotic
           A        B         C          D