1. Solution and colligative properties — Chemistry STD 12 Science — Question

Assertion $A :$ Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation.

Reason $R$ : Fluorine is the most electronegative element and hydrogen bonds in $HF$ are symmetrical.

In the light of the above statements, choose the most appropriate answer from the options given below.

$\begin{array}{|c|c|c|c|}\hline {} &\text { Molisch's Test} & {\text { Barfoed Test}} & {\text { Biuret Test}} \\ \hline \text { A} & { Positive } & {\text { Negative }} & {\text { Negative }} \\ \hline \text { B } & {\text { Positive }} & {\text { Positive }} & {\text { Negative }} \\ \hline \text { C } & {\text { Negative }} & {\text { Negative }} & {\text { Positive }} \\ \hline\end{array}$

$A, B$ and $C$ are respectively