The correct increasing order of the magnitude of standard enthalpies of formation for group-1 halides is
NaI < NaBr < NaCl < NaF
Ion having highest hydration enthalpy among the given alkaline earth metal ions is:
Method used for separation of mixture of products (B and C) obtained in the following reaction is: 
Which of the following best represents the temperature versus heat supplied graph for water, in the range of \(-20^\circ\text{C}\) to \(120^\circ\text{C}\)? 