261. Carbon dioxide was discovered by Joseph Black.
262. Inflammation of the liver is caused by hepatitis.
263. The human eye has an estimated resolution of 576 megapixels.
264. When sugar is added to water, its boiling point increases.
265. The SI unit of charge is the Coulomb.
266. The average adult has a blood volume of about 5 liters.
267. Sound cannot travel through a vacuum.
268. The planet that moves round the Sun at the highest speed is Mercury.
269. 1 light year is approximately equal to 9.5 × 10^12 kilometers.
270. Carrots are a good source of Vitamin A.
271. The good sources of iodine are sea foods.
272. Acid rain is mainly caused by emissions of sulfur dioxide and nitrogen oxide in the atmosphere.
273. Max Planck received the Nobel Prize in Physics in 1918 for his discovery of energy quanta.
274. Basic metals cannot be converted into gold by any means mentioned.
275. The chance of a diabetic baby being born to parents who are both heterozygous normal is 1/4.
276. Deficiency of vitamin Pyridoxine (B6) decreases hemoglobin production.
277. The reason why there is no total eclipse of the sun is due to the area of the sun covered by the moon.
278. A moderator is used in a nuclear reactor to slow down the speed of neutrons.
279. In a railway track, two rails are joined end to end with a gap between them to avoid accidents due to expansion in summer.
280. Parsec is a unit of distance.