
- A$BHC$ and $HCB$
- ✓$HCB$ and $BHC$
- C$HCB$ and $HCB$
- D$BHC$ and $BHC$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$2P(s) + 3C{l_2}(g)\,\, \to \,\,2PC{l_3}(l);\,\Delta H = - 151.8\,kcal$
$PC{l_3}(l) + C{l_2}(g)\,\, \to \,\,PC{l_5}(s);\,\,\Delta H = - 32.8\,kcal$
......$kcal$
$A.$ Surface tension is the outcome of equal attractive and repulsion forces acting on the liquid molecule in bulk.
$B.$ Surface tension is due to uneven forces acting on the molecules present on the surface.
$C.$ The molecule in the bulk can never come to the liquid surface.
$D.$ The molecules on the surface are responsible for vapour pressure if the system is a closed system.

$(a)$ The $pH$ of a mixture containing $400\, mL$ of $0.1\, M\, H_2SO_4$ and $400\, mL$ of $0.1\, M\, NaOH$ will be approximately $1.3$.
$(b)$ Ionic product of water is temperature dependent.
$(c)$ A monobasic acid with $K_a = 10^{-5}$ has a $pH = 5$. the degree of dissociation of this acid is $50\%$.
$(d)$ The Le Chatelier’s principle is not applicable to common-ion effect.
The correct statements are: