MCQ
The reagent that can distinguish benzaldehyde from propionaldehyde is
- A$I_2/NaOH$
- ✓Fehling's solution
- CTollens reagent
- D$2, 4-$ dinitrophenyl hydrazine
✓
Answer
Correct option: B.
Fehling's solution
b
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
${V_2}{O_5}$ is useful as catalyst in
→The increasing order of basicity of the following compounds is
In E2 elimination some compounds follow Hofmann's rule which means:
If $\alpha $ is the degree of dissociation of $N{a_2}S{O_4}$, the Vant Hoff's factor $ (i) $ used for calculating the molecular mass is
→What is the $e.m.f$. of the cell .............. $\mathrm{V}$
→$Cr/Cr^{3+} (1.0\ M)\ ||\ Co^{+2} (1.0\ M)/Co$
$[E^o$ for $Cr^{3+}/Cr =\ -0.74\ V$ and $Co^{+2}/Co=\ -0.28\ V]$
Change in volume when $10\,\,ml$ of phosphine is decomposed
→The depression in freezing point observed for a formic acid solution of concentration $0.5\,mL\,L ^{-1}$ is $0.0405^{\circ}\,C$. Density of formic acid is $1.05\,g\,mL ^{-1}$. The Van't Hoff factor of the formic acid solution is nearly: (Given for water $k _{ f }=1.86\,K\,kg\,mol ^{-1}$ )
→The variation of equilibrium constant with temperature is given below
→Temperature $\quad$ Equilibrium constant
$\begin{array}{ll} T _{1}=25^{\circ} C & K _{1}=100 \\ T _{2}=100^{\circ} C & K _{2}=100\end{array}$
The values of $\Delta H ^{\circ}, \Delta G ^{\circ}$ at $T _{1}$ and $\Delta G ^{\circ}$ at $T _{2}$ (in $kJ\, mol ^{-1}$ ) respectively, are close to $\left[\right.$ Use $\left. R =8.314\, JK ^{-1} mol ^{-1}\right]$
$ClCH_2CH_2OH$ is stronger acid than $CH_3CH_2OH$ because of
→Starch can be used as an indicator for the detection of traces of