KCET2026ChemistrySome Basic Concepts of Chemistry
Match List-I with List-II and select the correct option (Based on mole concept): List-I List-II (a) 2 moles of ethene (i) 11.2 L volume at STP (b) Mass is equal to 66 g (ii) 56 g (c) 1 g of H ₂ (iii) 12.04 10²³ Molecules (d) 2 moles of water vapours (iv) 1.5 mole of CO ₂
Options
- Aa-ii, b-iv, c-i, d-iii
- Ba-iii, b-i, c-iv, d-ii
- Ca-i, b-iv, c-ii, d-iii
- Da-ii, b-iii, c-i, d-iv
Correct answer
A. a-ii, b-iv, c-i, d-iii
Step-by-step solution
For (a): Molar mass of ethene ( C ₂ H ₄ ) is 28 g/mol . Mass of 2 moles of ethene = 2 28 = 56 g . This matches with (ii). For (b): Molar mass of CO ₂ is 44 g/mol . Mass of 1.5 moles of CO ₂ = 1.5 44 = 66 g . This matches with (iv). For (c): Molar mass of H ₂ is 2 g/mol . Number of moles in 1 g of H ₂ = 1 2 = 0.5 mol . Volume at STP = 0.5 22.4 L = 11.2 L . This matches with (i). For (d): Number of molecules in 2 moles of water vapours = 2 6.022 10²³ = 12.04 10²³ molecules. This matches with (iii). The correct matchi