Chemistry-Objective Related Question Answers
276. Hydrogenation of coal produces?
Diesel
277. Non - metal shows metallic character?
Hydrogen
278. rue I with highest calorific value?
Hydrogen
279. 1st noble gas group in the periodic table?
Helium
280. The element shows highest thermal conductivity?
Helium
281. Second lightest element?
Helium
282. 2nd most abundant element in universe is?
Helium
283. Liquid Helium is used as?
Cryogenic refrigerant
284. Which gas is preferred for filling the weather balloons and air ships?
Helium
285. The elements used for the treatment of Asthma?
Helium and Oxygen
286. The elements used in welding are?
Helium and Argon
287. The lightest metal is?
Lithium
288. The element which is kept in wax?
Lithium
289. Beryllium was found by?
Louis Nicolas Vauqueli
290. Beryllium was isolated by?
Friedrich Wohler and Antoine Bussy
291. Naturally occurring compound of Beryllium?
Emerald
292. The word boron was originated from?
Borax
293. Compound used for making laboratory apparatus It?
Borosilicate glass
294. The compound; known as inorganic benzene?
Borozene
295. The only acid shows the characteristics of alkali?
Boric acid
296. The main content of eye drops?
Boric acid
297. The polish used in carom board?
Boric acid
298. The element considered as the fundamental element of life?
Carbon
299. The element having maximum tendency of catenation (catenation - Self linking property)?
Carbon
300. Two types of allotropes of carbon are?
(1) Crystalline (eg : diamond; graphite; fullerene; graphine) (2) Amorphous (eg: coal; charcoal)
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