NEETChemistryThermodynamics (C)
Match List I with List II. List I (Process) List II (Thermodynamic signs) A. 2 O ₃( g ) 3 O ₂( g ) I. H > 0, S > 0 B. 3 O ₂( g ) 2 O ₃( g ) II. H C. H ₂ O ( l ) H ₂ O ( g ) III. H 0 D. 2 H ( g ) H ₂( g ) IV. H > 0, S Choose the correct answer from the options given below:
Options
- AA-IV, B-III, C-I, D-II
- BA-III, B-IV, C-I, D-II
- CA-III, B-IV, C-II, D-I
- DA-I, B-II, C-IV, D-III
Correct answer
B. A-III, B-IV, C-I, D-II
Step-by-step solution
(A) 2 O ₃( g ) 3 O ₂( g ) : The decomposition of ozone into oxygen is an exothermic process ( H 0 ). Matches III. (B) 3 O ₂( g ) 2 O ₃( g ) : The formation of ozone from oxygen is an endothermic process ( H > 0 ). The number of gaseous moles decreases from 3 to 2, so entropy decreases ( S (C) H ₂ O ( l ) H ₂ O ( g ) : Vaporisation of water requires heat ( H > 0 ) and forms a gas from a liquid, increasing randomness ( S > 0 ). Matches I. (D) 2 H ( g ) H ₂( g ) : The combination of two H atoms to form an H ₂ molecule