Punjab 10th Class Chemistry Chapter 8 Chemical Industries Mcqs Test Online Punjab 10th Class Chemistry Chapter 8 Chemical Industries Test Preparation Online 12345678910 Question 1 of 10Chemistry 1. What happens when ammonium carbonate is distilled with steam? 1.Carbon dioxide is released 2.Urea is produced 3.Urea solution is produced 4.Ammonia is produced Question 1 of 10Question 2 of 10 2. The naturally occurring metallic compounds are called as 1.Mineral 2.Gangue 3.Ore 4.Rock Question 2 of 10Question 3 of 10 3. Calcination is the process in which sodium hydrogen carbonate is heated to get sodium carbonate. Which is not obtained in this process? 1.Na₂CO₃ 2.H₂O3.CO₂ 4.CO Question 3 of 10Question 4 of 10 4. Percentage of nitrogen in urea is 184.108.40.206.2 3.35 4.80 Question 4 of 10Question 5 of 10 5. Which of the followings is not a raw material for the manufacture of soda ash. 1.Carbon monoxide 2.Brine 3.Ammonia 4.Lime stoneQuestion 5 of 10Question 6 of 10 6. In electrolytic refining of copper, __________ is used as anode. 1.Electrolytic tank 2.Impure copper 3.Pure copper 4.Copper sulphate Question 6 of 10Question 7 of 10 7. Chemical formula of slaked lime is 1.Ca(OH)₂ 2.CaO 3.CaCl₂4.CaCO₃ Question 7 of 10Question 8 of 10 8. Which of the following steps is not used in the extraction process of metals: 1.Bessemerization2.Flotation 3.Smelting 4.Roasting Question 8 of 10Question 9 of 10 9. A mixture of Cu₂S and FeS called matte is produced in one of the metallurgical operations in the extraction of copper. The name of this operation is: 1.Bessemerization 2.Electro-refining 3.Roasting 4.Smelting Question 9 of 10Question 10 of 10 10. The separation of minerals from gangue is called concentration. Which of the following methods is used for concentration? 1.Refining 2.Flotation3.Roasting 4.Smelting Question 10 of 10 Loading... Test By Subject Punjab Test By Topics 10th Class Chemistry You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.