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SET-17
321. The substance added to fireworks to produce yellow color is: Sodium.
322. The color of Iron sulfate is: Green.
323. The color produced when Uranium oxide is added to glass is: Yellow.
324. The color of the warning signal light in laboratories is: Yellow.
325. The color produced when Cadmium sulfide is added to glass is: Yellow.
326. Why is erythrosine added to artificial drinks?
to produce Red color.
327. The color of Potassium permanganate is: Purple.
328. The color of Gomed/Onyx is: Brown.
329. The process of adding water to quicklime is: Slaking.
330. What is extracted by Burton's process?
Diesel.
331. The process of producing Ammonia is: Haber process.
332. The state of liquids flowing against gravity at very low temperatures is: Superfluidity.
333. The process of heating ore in the absence of air at a temperature lower than its melting point is: Calcination.
334. The process of concentrating sulfide ores is: Froth floatation.
335. The process of producing Gold and Silver is: Cyanide process.
336. The main constituent of Panchaloha is: Copper.
337. ------- is known as "Natural Antibacterial Metal".
338. A metal known as 'Ayas' in ancient India: Copper
339. Azurite is an ore of which metal?
Copper
340. Malachite is an ore of which?
Copper
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