Synthesis of Aldehydes and Ketones Using Carboxylic Acid and Its Derivatives

Q. Benzenediazonium chloride on treatment with water gives:

1. Benzene
2. o-chlorophenol
3. Anisole
4. Phenol

Q.

${\mathrm{PbI}}_4$ Does Not Exist Because?

Q. Which of the following give(s) a meso-compound as the main product?

1. 
2. 
3. 
4. 

Q. Chloroform on reduction with Zinc and HCl produces

1. Carbon tetrachloride
2. Methane
3. Methylene dichloride
4. Methyl chloride

Q.

Give an example of a cyanohydrin reaction.

Q. The reaction 2A + B → products, follows the mechanism2A → A_2 (fast)A_2 + B→ P (slow).The order of the reaction is:

Q. Replacement of diazonium group with fluoride is known as:

1. Gattermann reaction
2. Sandmeyer reaction
3. Balz-Schiemann reaction
4. Etard reaction

Q.

Propyl nitrite may be converted into butyl amine by using which of the following reducing agent?

1. ${\mathrm{LiAlH}}_4$

2. $\mathrm{Sn}$or $\mathrm{HCl}$

3. Conc. $\mathrm{HCl}$

4. None Of These

Q. Which of the following alcohols reacts most readily with Lucas reagent?

1. $C{H}_{3}C{H}_{2}C{H}_{2}OH$
2. $(C{H}_3{)}_{2}CHOH$
3. $(C{H}_3{)}_{3}COH$
4. $C{H}_{3}C{H}_{2}OH$

Q. (a) Write the chemical reaction involved in Etard reaction.

(b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction:

$C{H}_3-CHO,C_6{H}_{5}COC{H}_3,HCHO$

(c) Why is $p{K}_a$ of $Cl-C{H}_2-COOH$ lower than the that of $C{H}_{3}COOH$?

(d) Write the product in the following reaction:
$C{H}_{3}C{H}_{2}CH=CH-C{H}_{2}CN\underset{2.H_{2}O}{\overset{1.(i-Bu{)}_{2}AIH}{\to }}$

(e) A and B are two functional isomers of compound $C_3{H}_{6}O$. On heating with NaOH and $I_2$, isomer A forms yellow precipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.

Q.

What are the steps in the preparation of: (i) ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ from chromite ore. (ii) ${\mathrm{KMnO}}_4$ from pyrolusite ore.

Q. A mixture of cyclohexanol and cyclohexanone is oxidized by nitric acid in a multi-step reaction. This is the industrial method to synthesize:

1. Benzene
2. Toluene
3. Adipic acid
4. Decalin

Q. When acetaldehyde is heated with Fehlings's solution it gives a precipitate of

1. Cu
2. CuO
3. $C{u}_{2}O$
4. $Cu+C{u}_{2}O+CuO$

Q. Match List-I with List-II

List-I (Chemical reaction)	List-II (Reagent used)
(a)$C{H}_{3}COOC{H}_{2}C{H}_3\to C{H}_{3}C{H}_{2}OH$	(i)$C{H}_{3}MgBr/H_3{O}^{+}$ (1 equivalent)
(b) $C{H}_{3}COOC{H}_3\to C{H}_{3}CHO$	(ii)$H_{2}S{O}_4/H_{2}O$
(c) $C{H}_{3}C\equiv N\to C{H}_{3}CHO$	(iii)$DIBAL-H/H_{2}O$
(d) $C{H}_{3}C\equiv N\to C{H}_{3}COC{H}_3$	(iv) $SnC{l}_2,HCl/H_{2}O$

Choose the most appropriate match.

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1. $\left(a\right)-\left(iv\right),\left(b\right)-\left(ii\right),\left(c\right)-\left(iii\right),\left(d\right)-\left(i\right)$
2. $\left(a\right)-\left(ii\right),\left(b\right)-\left(iii\right),\left(c\right)-\left(iv\right),\left(d\right)-\left(i\right)$
3. $\left(a\right)-\left(iii\right),\left(b\right)-\left(ii\right),\left(c\right)-\left(i\right),\left(d\right)-\left(iv\right)$
4. $\left(a\right)-\left(ii\right),\left(b\right)-\left(iv\right),\left(c\right)-\left(iii\right),\left(d\right)-\left(i\right)$

Q. Benzoyl chloride on reduction with $H_2/Pd-BaS{O}_4$ produces________

1. Benzoic acid
2. Benzaldehyde
3. Benzyl alcohol
4. Benzoyl sulphate

Q. $H_2{O}_2$ is present in which of the following reagent?

1. Etard’s reagent
2. Lucas reagent
3. Brady’s reagent
4. Fenton’s reagent

Q. $C_2{H}_2\frac{H{g}^{2+}}{H_{2}S{O}_4.H_{2}O}A\stackrel{\left[O\right]}{\to }B$. The compound B is?

1. an acid
2. an aldehyde
3. ketone
4. ethanol

Q. In Rosenmund reactions, presence of $BaS{O}_4$ acts as _______ for Pd.

1. promoter
2. moderator
3. inhibitor
4. poison

Q. $C_2{H}_2\frac{H{g}^{2+}}{H_{2}S{O}_4.H_{2}O}A\stackrel{\left[o\right]}{\to }B$. The compound B is?

1. an acid
2. an aldehyde
3. ketone
4. ethanol

Q.

How does H₂O₂ behave as a bleaching agent?

Q. Identify X in the reaction below :

1. alkane nitrile
2. alkyl isonitrile
3. aldoxime
4. alkyl halide

Q. Choose the correct answer among the alternatives given:
In the following reaction, product $\left(P\right)$ is:
$R-\stackrel{O}{\stackrel{||}{C}}-Cl\underset{pd/BaS{O}_4}{\overset{H_2}{\to }}P$

1. $RCHO$
2. $RC{H}_3$
3. $RCOOH$
4. $RC{H}_{2}OH$

Q. In the Rosenmund reduction, the catalyst used is :

1. $Zn/HCl$
2. $Pd/BaS{O}_4$
3. Raney $Ni$
4. $Sn/HCl$

Q. Complete the following reactions :​
*HCl + O2 2 CuCl--------->
* Ca(OH)2 + Cl2------->
*XeF4 + H2O--------->
*Na2SO3 + Cl2 + H2O-------->
*NaHCO3 + HCl-------->

Q. Reduction of acetyl chloride with $H_2$ in presence of Pd and $BaS{O}_4$ gives :

1. $C{H}_{3}COC{H}_3$
2. $C_2{H}_{5}OH$
3. $C{H}_{2}COOH$
4. $C{H}_{3}CHO$

Q. The reduction of benzoyl chloride with $Pd$ and $BaS{O}_4/CaS{O}_3$ produces :

1. benzyl chloride
2. benzaldehyde
3. All of the above
4. benzoic acid

Q. The conversion: $EtMgBr\to C_3{H}_{5}OH$ takes place with the help of

1. $HCHO$ in water
2. $HCHO$ in ether
3. $HCOOH$
4. water only

Q. Which of the following reagents convert the acid chloride into aldehyde?
$C{H}_3-C{H}_2-C{H}_2-CO-Cl\to C{H}_3-C{H}_2-C{H}_2-CHO$

1. $H_2,Pd,BaS{O}_4$
2. $(C{H}_3-C{H}_2-C{H}_2-C{H}_2{)}_{3}SnH$
3. $LiAl{H}_4$
4. NaH

Q. $RCOCl+H_2\stackrel{Pd-BaS{O}_4}{\to }RCHO+HCl$. The reaction is known as:

1. Wolff-Kishner reduction
2. Rosenmund reduction
3. Stephen's reaction
4. Clemmensen's reduction

Q. In the Rosenmund's reaction,

1. promotes catalytic activity of $Pd$
2. removes the $HCl$ formed in the reaction
3. deactivates palladium
4. activates palladium