$(A)$ Ice floats in water.
$(B)$ Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions.
$(C)$ Formic acid is more acidic than acetic acid.
$(D)$ Dimerisation of acetic acid in benzene.
The basicity of $1^{\circ}$ amines is more than $3^{\circ}$ amines as after they donate lone pair to $H ^{+}$, they can form $H -$ bonding with $H _2 O$ molecules and get easily stabilized by solvation. Where as in tertiary amines, the stabilization by solvation is very less.
The dimerisation of acetic acid in benzene is due to $H$-bonding
$Image$
Hence ans is: $A , B , D$
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Sucrose $+$ $H _{2} O \rightleftharpoons$ Glucose $+$ Fructose
If the equilibrium constant $\left( K _{c}\right)$ is $2 \times 10^{13}$ at $300\, K$, the value of $\Delta_{ r } G^{\Theta}$ at the same temperature will be:
