306. Compound that does not form a clear solutton with cold water is- Benezoic Acid
307. The lightest noble gas is
- Helium
308. Light emitted during chemical reaction is called
- chemiluminescence
309. Amber colour is imparted to glass by adding
- carbon
310. Simpson and Harrison are associated with the invention of
- Chloroform
311. Epsom salt is
- hydrated magnesium sulphate
312. Penicillin was invented by Fleming in the year
-1929
313. The salt known as 'Pearl ash' is-
- Potassium carbonate
314. The National chemical Laboratory is situated in
- Pune
315. PVC plastics are obtained from vinyl chloride by the process of
- polymerization
316.Milk is an example of
- emulsion
317. The boiling point of water, on the kelvin scale of temperature is
- 373
318. The substance that causes the worst air pollution is
- carbon monoxide
319. Dolomite is an ore of
-Mg
320. The element used in photocopying machines is
- Selenium
321. In breeder reactors uranimn-238 is converted into
- Plutonium-239
322. The process of elimination of water from any system is called .
- dehydration
323. Chemotherapy deals with
- The study and uses of chemicals in the cure of diseases.
324. The point at whichthe solid, liquid and gaseous forms of a substance co-exist is
called its
- triple point
325. The IC chips used in computers are made of
- Silicon
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