Question

Statement-I: The enthalpy of neutralization of the reaction between HCl and NaOH is – 13.7kCal/mol. If the enthalpy of neutralization of oxalic acid (H₂C₂O₄) by a strong base in -25.4 kCal/mol, then the enthalpy changes (∆H) of the process H₂ C₂ O₄→ 2H⁺+C₂O₄^2- is 11.7 kCal/mol. 

Statement-II: H₂ C₂ O₄ is a weak acid 

(A) Statement-I is true, statement-II is true and statement-II is correct explanation for statement-I 

(B) Statement-I is true, statement-II is true and statement-II is NOT the correct explanation for statement-I   

(C) Statement-I is false, statement-II is true.   

(D) Statement-I is true, statement-II is false

Answer 1

Correct option (D) Statement-I is true, statement-II is false

Explanation:

1/8 S₈ (s) +O₂ (g) ? → SO₂ (g)

S – (–2 × 2) = 0  

S = 4

Max oxidation state = 6