Which of the following compounds has a negative enthalpy of solut… - Vidyadip

MCQ

Which of the following compounds has a negative enthalpy of solution?

A
$KCl$
B
$KBr$
✓
$KF$
D
$KI$

✓

Answer

Correct option: C.

$KF$

c
$F ^{-}$has high hydration energy due to small size and anion and that energy is liberated out so the reaction is exo ( means negative enthalpy)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The incorrect statement about Glucose is :

$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
R-C-H\xrightarrow{R-N{{H}_{2}}}R-CH=N-R. \\
\end{matrix}$ This reaction gives best yield at

Addition of sodium hydroxide solution to a weak acid $(HA)$ results in a buffer of $pH\, 6$. lf ionisation constant of $HA$ is $10^{-5}$ , the ratio of salt to acid concentration in the buffer solution will be

The reaction between chlorobenzene and chloral in the presence of concentrated sulphuric acid produces

Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of $2-$ fluoroethanol is

The correct sequence of increasing covalent character is represented by

The most stable carbocation from the following is :

$2{x_{6(g)}} \rightleftharpoons 4{x_{3(g)}}$

a $20\ L$ box containing $X_6$ and $X_3$ at equilibrium at $1500\ K$ . $K_p = 4 \times 10^{18}\ atm$ . Assuming ${P_{{x_3}}} > > {P_{{x_6}}}$ and total pressure is $10\ atm$ .The partial pressure of $X_6$ will be

Methanol and ethanol are distinguished by the

Time required for completion of $99.9 \%$ of a First order reaction is_________ times of half life $\left(\mathrm{t}_{1 / 2}\right)$ of the reaction.