291. Which one of the following is the main culprit in the thinning of the Ozone layer in the earth’s stratosphere?
A: Chlorofluorocarbons
B: Carbon dioxide
C: Nitrogen oxides
D: Methane
292. Glucose syrup is made from_____?
A: Wheat
B: Oat
C: Maize
D: Rice
293. What is not a greenhouse gas?
A. Carbon dioxide
B. Nitrogen
C. Methane
D. Ozone
294. What system is our brain in?
A. Respiratory system
B. Bone system
C. Nervous system
D. Digestive system
295. Which of the following is used commonly in storage batteries?
A. Copper
B. Mercury
C. Lead
D. Silicon
296. In a standard drug test, Which seeds can cause false positive results for opium use?
A. Pumpkin
B. Sunflower
C. Poppy
D. Sesame
297. Epiphytic and parasitic plants grow on which of the following?
A. Humans
B. Rocks
C. Plants
D. None of the above
298. What is the atomic number for Hydrogen?
A. 36
B. 12
C. 1
D. 24
299. The branch of study dealing with old age and aging is called:
A. Oncology
B. Gerontology
C. Teratology
D. Ornithology
300. If a green leaf is seen in red light its color will be:
A. Black
B. Red
C. Blue
D. Yellow
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