Chemistry-Objective Related Question Answers
326. Percent of Nitrogen presence in atmosphere?
78%
327. Main content of protein?
Nitrogen
328. Which gas controls burning?
Nitrogen
329. The acid content of acid rain is?
Nitrous Oxide
330. The compound used as anesthetic?
Nitrogen compound
331. Largest single constituent of earth's atmosphere?
Nitrogen compound
332. Gas known as laughing gas?
Nitrous Oxide
333. Gas formed during lightning?
Nitrogen dioxide
334. TNT - Tri Nitro Toluene is known as?
Trotyl
335. RDX- Research Department Explosive is known as?
Cyclonite
336. The nitrogen compound used as indelible ink (Voters' ink)?
Silver Nitrate
337. Oxygen was experimentally prepared by?
Karl Scheele
338. Oxygen was discovered by?
Joseph Priestly
339. Element nature of oxygen was established by?
Lavoisier
340. Burning is helped by which gas?
Oxygen
341. What is the colour of oxygen?
colourless
342. What is the taste of oxygen?
tasteless
343. What is the odour of oxygen?
odourless
344. The colour of liquid oxygen is?
Light blue colour
345. Nature of oxygen?
Paramagnetic
346. Most abundant element in earth crust?
Oxygen
347. Number of atoms in?
Oxygen molecule - 2; Ozone - 3
348. Ozone layer is found in?
Stratosphere
349. The depletion of ozone layer is caused by?
Chlorofluorocarbon (CFC)
350. Industrial name of CFC?
Freon
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