A) both acid and base are weak
B) acid is weak and base is strong
C) both acid and base are strong
D) acid is strong and base is weak
Correct Answer: C
Solution :
Heat of neutralisation for strong acid and strong base is always close to 13.7 kcal. \[\underset{\begin{smallmatrix} strong \\ acid \end{smallmatrix}}{\mathop{HA}}\,+\underset{\begin{smallmatrix} strong \\ base \end{smallmatrix}}{\mathop{BOH}}\,{{H}_{2}}O+AB\] \[\Delta H=-13.7\,kcal\] The heat of neutralisation of strong acid and strong base is actually the heat of formation of 1 g mole of water from 1g of\[{{H}^{+}}\]and 1 g of \[O{{H}^{-}}\]
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