10th class Chemistry chapter 16 online mcq test with answers for matric part 2 chemistry unit 16(Chemical Industries)

Chemistry 10th Class English Medium Unit 16 Online Test

Sr. #	Questions	Answers Choice
1	In solvay's process slaked lime is used to:	Prepare CO<sub>2</sub> Prepare quick lime Recover ammonia Form Na<sub>2</sub>CO<sub>3</sub>
2	When CO₂ is passed through the ammonical brine the only salt that precipitates is:	NaHCO<sub>3</sub> NH<sub>4</sub>HCO<sub>3</sub> Na<sub>2</sub>CO<sub>3</sub> (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>
3	Concentration of the copper ore is carried out by:	Calcinations Roasting Forth flotation Distillation
4	In the bessemerization process.	Roasted ore is beated. Molten matte is removed. Molten matte is heated Molten matte is added
5	Matte is a mixture of:	FeS and CuS Cu<sub>2</sub>O and FeO Cu<sub>2</sub>S and FeS CuS and FeO
6	Froth flotation process is used to concentrate the ore on:	Density basis Concentration basis Wetting basis Magnetic basis
7	Concentration is a .	Mixing technique Separating technique Boiling technique cooling technique
8	The residual oil is heated above 400 c to produce.	Lubricants Paraffin wax Asphalt All
9	Ammonical brine is prepared by dissolving ammonia gas in.	NaCl CaCO<sub>3</sub> CaCl<sub>2</sub> Na<sub>2</sub>SO<sub>4</sub>
10	Sodium carbonate is manufactured by.	Haber's process Ostwald's process Solvay's process All
11	Concentration is a separating technique in which mineral is separated from.	Gangue Silicates Aluminates All
12	The number of carbon atoms present in fuel oil.	14-18 15-18 16-18 17-18