Chemistry

Of the following four aqueous solutions, total number of those solutions whose freezing point is lower than that of 0.10 M C₂H₅OH is___________

(Integer answer)

The Born-Haber cycle for KCl is evaluated with the following data:

${\Delta }_f{H}^{\Theta }forKC=-436.7kJmo{l}^{-1};{\Delta }_{sub}{H}^{\Theta }forK=89.2kJmo{l}^{-1};$

${\Delta }_{ionization}{H}^{\Theta }forK=419.0kJmo{l}^{-1};{\Delta }_{electrongain}{H}^{\Theta }forC{l}_{\left(g\right)}=-348.6kJmo{l}^{-1};$

${\Delta }_{bond}{H}^{\Theta }forC{l}_2=243.0kJmo{l}^{-1}$  

The magnitude of lattice enthalpy of KCl in kJ mol^-1 is_________ (Nearest integer)

Given below are two statements one is labeled as Assertion A and the other is labeled as Reason R:

           Assertion A: The amphoteric nature of water is explained by using Lewis acid/base concept

           Reason R: Water acts as an acid with NH₃ and as a base with H₂S

           In the light of the above statements choose the correct answer form the options given below:

Given below are two statements.

           Statement I: During electrolytic refining, blister copper deposits precious metals.

           Statement II: In the process of obtaining pure copper by electrolysis method, copper blister is used to make the anode.

           In the light of the above statements, choose the correct answer form the option given below:

The correct order of electron gain enthalpies of Cl, F, Te and Po is

The major product formed in the following reaction is:

The incorrect statement is:

Given below are two statements.

Statement I:  The choice of reducing agents for metals extraction can be made by using Ellingham diagram, a plot of $\Delta G$  vs temperature.

100 mL of Na₃PO₄ solution contains 3.45g of sodium. The molarity of the solution is_________ * 10^-2 mol L^-1, (Nearest integer)

[Atomic Masses - Na : 23.0u, O : 16.0 u, P : 31.0 u]