NEETChemistrySome Basic Concepts of Chemistry
Match List-I with List-II. List-I (Hydrocarbon, 1 mole) List-II (Moles of O₂ required for complete combustion) (A) Ethene (I) 2.5 (B) Ethyne (II) 3 (C) Ethane (III) 3.5 (D) Propane (IV) 5 Choose the correct answer from the options given below:
Options
- A(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
- B(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
- C(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
- D(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
Correct answer
B. (A)-(II), (B)-(I), (C)-(III), (D)-(IV)
Step-by-step solution
The general equation for the complete combustion of a hydrocarbon C_xH_y is: C_xH_y + (x + y 4 )O₂ xCO₂ + y 2 H₂O For 1 mole of each hydrocarbon: (A) Ethene ( C₂H₄ ): x=2, y=4 . Moles of O₂ = 2 + 4 4 = 3 . (B) Ethyne ( C₂H₂ ): x=2, y=2 . Moles of O₂ = 2 + 2 4 = 2.5 . (C) Ethane ( C₂H₆ ): x=2, y=6 . Moles of O₂ = 2 + 6 4 = 3.5 . (D) Propane ( C₃H₈ ): x=3, y=8 . Moles of O₂ = 3 + 8 4 = 5 . Thus, the correct matching is (A)-(II), (B)-(I), (C)-(III), (D)-(IV). Incorrect options often result from confusing the chemical