MCQ
Benzoin is
- ACompound containing an aldehyde and a ketonic group
- B$\alpha$, $\beta$ -unsaturated acid
- C$\alpha$-hydroxy aldehyde
- ✓$\alpha$-hydroxy ketone
✓
Answer
Correct option: D.
$\alpha$-hydroxy ketone
d
Benzoin is an organic compound with the formula $PhCH ( OH ) COPh$. It is a hydroxy ketone attached to two phenyl groups. It is alpha hydroxy ketone.
Benzoin is an organic compound with the formula $PhCH ( OH ) COPh$. It is a hydroxy ketone attached to two phenyl groups. It is alpha hydroxy ketone.
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
Hydroboration of $1$- methylcyclopentene using $B_2D_6$ , followed by treatment with alkaline hydrogen peroxide, gives
→In the following molecule, the two carbon atoms marked by asterisk (*) possess the following type of hybridized orbitals ${H_3}C - {C^*} \equiv {C^*} - C{H_3}$
→Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. ${H_2}S{O_4}$ and ${H_2}O$
→An element which never has a positive oxidation number in any of its compounds
The electrochemical equivalent of a metal is $3.3 \times {10^{ - 7}}\,kg/coulomb$. The mass of the metal liberated at the cathode when a $3\, A$ current is passed for $2$ seconds will be
→Under the specified conditions, substrate $X$ undergoes substitution and elimination reactions to give products $A - D. A$ and $B$ are stereoisomers, but not enantiomers. $C$ and $D$ are enantiomers. $A$ is not an isomer of $C$. Which of the following could be the starting material $X$ ?
→$X\xrightarrow[\Delta ]{{{H}_{2}}O}A+B+C+D$
Which of the following statements are correct?
→$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese
$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.
$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.
$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$
Choose the correct answer from the options given below:
The colour discharge tubes for advertisement mainly contain
Heat of combustion $\Delta H$ of $C{H_4},\,{C_2}{H_6},\,{C_2}{H_4}$ and ${C_2}{H_2}$ gases are $-212.8, -373.0, -337.0$ and $-310.5\, kcal $ respectively at the same temperature. The best fuel among these gases is
→The standard reduction potential data at $25^{\circ} C$ is given below.
→$E ^0\left( Fe ^{3+} . Fe ^{2+}\right)=+0.77 V $
$E ^0\left( Fe ^{2+} . Fe \right)=-0.44 V $
$E ^{\circ}\left( Cu ^{2+} . Cu \right)=+0.34 V $
$E ^0\left( Cu ^{+} . Cu \right)=+0.52 V $
$E ^{\circ}\left( O _2( g )+4 H ^{+}+4 e ^{-} \rightarrow 2 H _2 O \right)=+1.23 V $
$E ^{\circ}\left( O _2( g )+2 H _2 O +4 e ^{-} \rightarrow 4 OH \right)=+0.40 V $
$E ^0\left( Cr ^{3+} . Cr \right)=-0.74 V $
$E ^{\circ}\left( Cr ^{2+} . Cr \right)=-0.91 V$
Match $E ^{\circ}$ of the rebox pair in List $I$ with the values given in List $II$ and select the correct answer using the code given below the lists:
| List $I$ | List $II$ |
| $P.$ $\quad E ^{\circ}\left( Fe ^{3+}, Fe \right)$ | $1.$ $\quad-0.18 V$ |
| $Q.$ $\quad E ^{\circ}\left(4 H _2 O \rightleftharpoons 4 H ^{+}+4 OH ^{-}\right)$ | $2.$ $\quad-0.4 V$ |
| $R.$ $\quad E ^{\circ}\left( Cu ^{2+}+ Cu \rightarrow 2 Cu ^{+}\right)$ | $3.$ $\quad-0.04 V$ |
| $S.$ $\quad E ^{\circ}\left( Cr ^{3+}, Cr ^{+2}\right)$ | $4.$ $\quad-0.83 V$ |
Codes: $ \quad P \quad Q \quad R \quad S $