An invert sugar is

$\frac{1}{2}C{l_2}(g)\xrightarrow{{\frac{1}{2}{\Delta _{diss}}{H^\Theta }}}Cl(g)\xrightarrow{{{\Delta _{eg}}{H^\Theta }}}$ $C{l^ - }(g)\xrightarrow{{{\Delta _{Hyd}}{H^\Theta }}}C{l^ - }(aq)$

(using the data,

${{\Delta _{diss}}H_{C{l_2}}^\Theta } = 240\,kJ\,mol^{-1}, {{\Delta _{eg}}H_{C{l}}^\Theta }= -349 \,kJ\,mol^{-1},$${{\Delta _{Hyd}}H_{C{l}}^\Theta }= -381 \,kJ\,mol^{-1}$ ) will be ............. $\mathrm{kJ\,mol}^{-1}$

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The reaction ${H_2}S + {H_2}{O_2} \to 2{H_2}O + S$ shows

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Select the correct statements from the following

$A$. Atoms of all elements are composed of two fundamental particles.

$B$. The mass of the electron is $9.10939 \times 10^{-31} kg$.

$C$. All the isotopes of a given element show same chemical properties:

$D$. Protons and electrons are collectively known as nucleons.

$E$. Dalton's atomic theory, regarded the atom as an ultimate particles of matter Choose the correct answer from the options given below

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Consider the following liquid-vapour equilibrium.

Liquid $\rightleftharpoons $ Vapour