Daily Practice Sheets 8th CBSE Chemistry 2023-24 PDF

Daily Practice Sheets CBSE_Class- VIII Daily Practice Sheets (PNCF) 8th CBSE (2023-24) Syllabus : (ii)Coal (iii)Petroleum-15 Ques...

Daily Practice Sheets CBSE_Class- VIII Daily Practice Sheets (PNCF) 8th CBSE (2023-24) Syllabus : (ii)Coal (iii)Petroleum-15 Ques CHEMISTRY 1. Which of the following is true about the fractional distillation of petroleum? a) Fractions of heavier mass are collected at the upper level of the column. b) Petroleum gas is collected from the uppermost level of the column. c) Asphalt is collected as a residue. d) Paraffin wax is obtained from the middle level of the column. (A) a and b (B) a, b and c (C) b and c (D) b, c and d 2. Which of the following is used in extraction of pure metals in metallurgical process? (A) Coke (B) Coal gas (C) Coal tar (D) Petroleum 3. Black gold is ________. 4. Match the following: Column - I Column - II As fuel for automobiles, as a solvent for dry cleaning, aviation A Bitumen i fuel. B Fuel oil ii for making paint, road surfacing As a fuel for trucks, buses, railway engines, water pumps, C Petrol and light naphtha iii and generators As an industrial fuel for boilers, D Diesel iv and furnaces. (A) (A) ii (B) i (C) iv (D) iii (B) (A) ii (B) iv (C) i (D) iii (C) (A) iii (B) i (C) iv (D) ii (D) (A) i (B) ii (C) iv (D) iii 5. The percentage of carbon present in the coke is _______. 6. ________ fertilizer is formed when ammonical liquor is treated with sulphuric acid. 7. The process of separation of chemical substances from coal tar is known as _______. TRUE/FALSE: 8. Destructive distillation of coal occurs in presence of excess of air 9. Toluene is used in making artificial sweetener saccharin and explosives like TNT. CBSE 1  Daily Practice Sheets CBSE_Class- VIII Multi Correct Answer Type: 10. The compounds used in the preparation of dyes are: (A) Benzene (B) Aniline (C) Naphthalene (D) Phenol 11. What is the maximum temperature maintained in the furnace during the fractional distillation of petroleum Very Short Answer Question: 12. ‘OPEC’ try to set production levels for petroleum. Enhance and write the full form of ‘OPEC’. 13. How many new substances products are formed majorly when coal undergoes destructive distillation and what they are? 14. Define carbonisation. 15. Depending on the carbon content, moisture and volatile compounds, coal is classified into how many categories? What are they? 2 CBSE