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The absolute enthalpy of neutralisation of the reaction
MgO(s) + 2HCl(aq) → MgCl₂(aq) + H₂O(l) will be
Options
(a) -57.33 kJ mol⁻¹
(b) greater then -57.33 kJ mol⁻¹
(c) less then -57.33 kJ mol⁻¹
(d) 57.33 kJ mol⁻¹
Correct Answer:
less then -57.33 kJ mol⁻¹
Explanation:
MgO is the oxide of weak base and we know that heat of neutralisation of 1 eq. of strong acid with strong base is -57.33 kJ/mol.
⇒ With weak base some heat is absorbed in dissociation of weak base.
⇒ Heat of neutralisation of weak base with strong acid will be – 57.33 kJ/mol.
Related Questions: - DDT is prepared by reacting chlorobenzen with
- Increasing order of rms velocities of H₂,O₂,N₂ and HBr is
- Mohr’s salt is
- Oxidation number of iodine in IO₃⁻, IO₄⁻, KI and I₂ respectively are
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- DDT is prepared by reacting chlorobenzen with
- Increasing order of rms velocities of H₂,O₂,N₂ and HBr is
- Mohr’s salt is
- Oxidation number of iodine in IO₃⁻, IO₄⁻, KI and I₂ respectively are
- The correct order of increasing bond length of C–H, C–O, C–C and C=C is
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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