Among the statements (I-IV), the correct ones are:

(I) Be has smaller atomic radius compared to $\mathrm{M}\mathrm{g}$   .

(II) Be has higher ionization enthalpy than Al.

(III) Charge/radius ratio of $\mathrm{B}\mathrm{e}$ is greater than that of $\mathrm{A}\mathrm{l}$ .

(IV) Both Be and Al form mainly covalent compounds.

The standard enthalpy of combustion at 25°C of hydrogen, cyclohexene (C₆H₁₀) and cyclohexane (C₆H₁₂) are –241, –3800 and –3920 kJ mol–1 respectively. Calculate the standard enthalpy of hydrogenation of cyclohexene.

HCP crystal is made of A ions and B ions are arranged in 2/3rd of octahedral voids. The simplest formula of compound is :-

Enthalpy of neutralisation of CH₃COOH by NaOH is – 50.6 kJ/mol and the heat of neutralisation of a strong acid with NaOH is – 55.9 kJ/mol. The value of ΔH for the ionisation of CH₃COOH is :

Kindly Consider following table–

<!-- [if !supportLists]-->(i)    <!--[endif]-->The correct match is–

 

 

  

Which of the following is a carbonate ore ?