General Science - Single MCQs (Page 30)

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Q291. Edward Jenner is associated with?...Q292. During burnings of fuels, carbon and hydrogen present in the fuels are?...Q293. Dry ice is?...Q294. Deficiency of which vitamin leads to 'Rickets' (softening of bones)?...Q295. Decibel unit is used to measure?...Q296. Damping off of seedlings is caused by?...Q297. Contact lenses are made from?...Q298. Cotton fibers are made of?...Q299. Cow milk is a rich source of?...Q300. Crossing?...