Tiêu đề 12. ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES.pdf ✅

1 JEE Advanced (2024) Hydrogen & Its Compound CHEMISTRY Only One Option Correct Type Question (1-5) 1. Bosch method for the manufacture of hydrogen gas uses [Chemical Reaction] (A) reaction of red hot coke with steam (B) reaction of red hot iron followed by reduction of Fe3O4 with syn gas (C) coal gasification followed by water—gas shift reaction (D) steam reforming process 2. In which of the following reactions does hydrogen acts as an oxidising agent? [Chemical Reaction] (A) H2 + F2 —→ (B) H2 + SiCl4 —→ (C) Na + H2—→ (D) CuO + H2—→ 3. The bond energy of covalent O–H bond in water is: [Properties] (A) equal to bond energy of hydrogen bond (B) greater than bond energy of hydrogen bond (C) lesser than bond energy of hydrogen bond (D) None of the above 4. 1000 g aqueous solution of CaCO3 contains 10 g of calcium carbonate. Hardness of the solution is: [hardness of water] (A) 10 ppm (B) 100 ppm (C) 1000 ppm (D) 10000 ppm 5. The volume of ‘10 Vol’ of H2O2 required to liberate 500 mL O2 at NTP is [Volume strength] (A) 50 ml (B) 100 ml (C) 125 ml (D) 25 ml One Or More Than One Correct Type Question (6-10) 6. Regarding ortho and para hydrogen which of the given conclusion is/are correct? [Type of hydrogen] (A) At absolute zero Kelvin temperature, hydrogen exists completely into para form. (B) With the increase in temperature, the ratio of ortho to para hydrogen increases. (C) The ratio of ortho to para hydrogen is independent of temperature. (D) At any temperature both ortho and para hydrogen are 50%. 7. Dihydrogen can be prepared on commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of CO and H2 gas is formed. It is known as_____. [Chemical Reaction] (A) water gas (B) syn gas (C) producer gas (D) industrial gas 8. Water may be softened by using: [Water softening] (A) sodium aluminium silicate (B) calgon (C) ion exchange resin (D) sodium phosphate 9. The presence of water can be inferred by: [Water] (A) using anhydrous CuSO4 which changes colour (B) using anhydrous CoCl2 which changes colour (C) the use of hydrated CuSO4 (D) taste and smell 10. H2O2 is prepared by the action of [Preparation] (A) Cold H2SO4 on BaO2 (B) Cold H3PO4 on BaO2 (C) Cold H2SO4 on MgO2 (D) Dilute HCl on MnO2 Integer Type Question (11-16) 11. Hardness of water is 200 ppm. The normality of CaCO3 in the water is in the form of y × x 10–3 . Identify y. [Hardness of water] 12. Washing soda (Na2CO3. 10H2O) is widely used in softening of hard water. If 1 L of hard water requires 0.0143 g of washing soda. What is hardness of water in terms of ppm of CaCO3? [Softening of water] 13. Find the volume strength of 1.6 N H2O2 solution. [Volume Strength] Practice Sheet
2 14. Half litre each of three samples of H2O2 labelled 10 vol., 15 vol., 20 vol. are mixed and then diluted with 1700 ml. of water. Calculate the relative strength of resultant H2O2 solution. [Volume Strength] 15. The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in basic medium is_____. [Chemical Reaction] 16. To a 25 mLH2O2 solution, excess of acidified solution of potassium iodide was added. The iodine liberated required 20 mL of 0.3 N sodium thiosulphate solution. Calculate the volume strength of H2O2 solution (IIT JEE 1997) [Chemical Reaction]
3 ANSWER KEY 1. ( C ) 2. ( C ) 3 . ( B ) 4 . ( D ) 5 . ( A ) 6 . (A, B ) 7 . (A, B ) 8 . (A, B, C ) 9 . (A, B ) 10 . ( A, B ) 11 . ( 4 ) 12. ( 5 ) 13 . ( 9 ) 14 . ( 7 ) 15 . ( 4 ) 16. (1.344)