Enthalpy change of combustion of a substance is:

Here are the answers to the MCQs:

(i) Enthalpy change of combustion of a substance is:
B) always negative

(ii) Which of the following equation correctly defines lattice energy of $\text{MgCl}_2$?
B) $\text{Mg}^{2+}_{(g)} + 2\text{Cl}^{-}_{(g)} \to \text{MgCl}_{2(s)}$

(iii) Which of the following quantity is NOT typically determined using Hess's Law?
C) Activation energy

(iv) Which of following has maximum enthalpy of hydration?
C) $\text{Al}^{3+}$

(v) The standard enthalpy change of formation of any element in its standard state is:
C) zero

(vi) Specific heat of water is:
A) $4.2 \text{ J } \text{g}^{-1} \text{K}^{-1}$

(vii) The enthalpy of solution can be expressed in terms of which of the following enthalpy changes?
C) $-\Delta H_{\text{lattice}} + \Delta H_{\text{hydration}}$

(viii) The enthalpy change for a reaction depends on:
C) Initial and final states of the reactants and products

(ix) Lattice energy is independent of:
D) Electrical Conductivity

(x) Born-Haber cycle is used to determine the:
C) Lattice Energy

(xi) An Example of Endothermic process is:
A) Evaporation

(xii) An Example of exothermic process is:
C) Combustion

(xiii) Enthalpy of atomization of Na metal is:
B) $108 \text{ kJ/mol}$

(xiv) For the reaction $\text{NaOH} + \text{HCl} \to \text{NaCl} + \text{H}_2\text{O}$. The change of enthalpy is called:
D) Heat of Neutralization

(xv) The Born-Haber Cycle is the application of _______ Law:
A) Hess's Law