Carboxylic Acids & Derivatives PYQs Set 6 (PDF)

Set 6 of 7 · Questions 151-180 of 181

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JEE Main Chemistry · Carboxylic Acids & Derivatives · Set 6 (Q151-180)

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151.
An unsaturated hydrocarbon X absorbs two hydrogen molecules on catalytic hydrogenation, and also gives following reaction : $X O_{3} Zn/H_{2} O A [Ag (NH_{3})_{2}]^{+}$ B(3-oxo-hexanedicarboxylic acid) X will be :
1. (1)
2. (2)
3. (3)
4. (4)
152.
Compound 'A’ (molecular formula $C_{3} H_{8}$ O) is treated with acidified potassium dichromate to form a product 'B' (mol. Formula $C_{3} H_{6}$ O). 'B' forms a shining silver mirror on warming with ammonical $A g N O_{3}$ . 'B' when treated with an aqueous solution of $H_{2} N C O N H N H_{2}$ , HCl & sodium acetate gives a product 'C'. Identify the structure of 'C’
1. (1) $C H_{3} C H_{2} CH = N N H C O N H_{2}$
2. (2) $C H_{3} - C (C H_{3}) = N - C O N H N H_{2}$
3. (3) $C H_{3} - CH = N.NH - C O N H_{2}$
4. (4) $C H_{3} C H_{2} CH = N C O N H N H_{2}$
153.
Compound $A (C_{9} H_{10} O)$ shows positive iodoform test. Oxidation of A with $KMn O_{4}$ /KOH gives acid $B (C_{8} H_{6} O_{4})$ . Anhydride of B is used for the preparation of phenolphthalein. Compound A is:
1. (1)
2. (2)
3. (3)
4. (4)
154.
In the following reaction
Aldehyde + Alcohol $HCl$ Acetal
Aldehyde Alcohol
HCHO $^{t}$ BuOH
$C H_{3}$ CHO MeOH
The best combination is :
1. (1) $HCHO and^{t} BuOH$
2. (2) $C H_{3} CHO and^{t} BuOH$
3. (3) $HCHO and MeOH$
4. (4) $C H_{3} CHO and MeOH$
155.
A molecule (" P ") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q")
on ozonolysis followed by reflux under alkaline condition gives ("R"). The structure of ("R") is given below.

The structure of (" $P^{’ ’}$ ) is
1. (1)
2. (2)
3. (3)
4. (4)
156.
Which of the following reagents would distinguish cis-cyclopenta-1,2- diol from the trans-isomer ?
1. (1) $Aluminium isopropoxide$
2. (2) $Acetone$
3. (3) $Ozone$
4. (4) $MnO2$
157.
The product formed by the reaction of an aldehyde with a primary amine is :
1. (1) $Aromatic acid$
2. (2) $Schiff base$
3. (3) $Ketone$
4. (4) $Carboxylic acid$
158.
Identify ' $A$ ' in the following reaction. $A +$ Acetic anhydride $\to H^{+}$ Aspirin + Acetic acid
1. (1) $Acrylic acid$
2. (2) $Oxalic acid$
3. (3) $Salicylic acid$
4. (4) $Phthalic acid$
159.
The major product of the following reaction is:
$OH | C H_{3} CHC H_{2} C H_{2} N H_{2} ethyl formate (1 equiv .) triethylamine$
1. (1) $OH | C H_{3} - CH - CH = C H_{2}$
2. (2) $OH | C H_{3} CHC H_{2} C H_{2} NHCHO$
3. (3)
4. (4) $CH_{3} CH = CH - C H_{2} N H_{2}$
160.
Compound $A$ has a molecular formula $C_{2} C l_{3} O H$ . It reduces Fehling’s solution and on oxidation, it gives a monocarboxylic acid $B$ . If $A$ is obtained by the action of chlorine on ethyl alcohol, then compound $A$ is
1. (1) $methyl chloride$
2. (2) $monochloroacetic acid$
3. (3) $chloral$
4. (4) $chloroform.$
161.
Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound if water during the reaction is continuously removed. The compound formed is generally known as
1. (1) $Amine$
2. (2) $Imine$
3. (3) $Enamine$
4. (4) $Schiff's base$
162.
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin
which on hydrolysis forms a racemic mixture of $α$ ‐hydroxy acid. The carbonyl compound is
1. (1) $formaldehyde$
2. (2) $acetaldehyde$
3. (3) $acetone$
4. (4) $diethyl ketone$
163.
The correct sequence of reagents for the preparation of Q and R is :
1. (1) $(i) C r_{2} O_{3},770K,20atm; (ii) C r O_{2} C l_{2}, H_{3} O^{+}; (iii) NaOH ; (iv) H_{3} O^{+}$
2. (2) $(i) C r O_{2} C l_{2}, H_{3} O^{+}; (ii) C r_{2} O_{3}, 770 K, 20 atm; (iii) NaOH ; (iv) H_{3} O^{+}$
3. (3) $(i) K M n O_{4}, O H^{-}; (ii) M o_{2} O_{3}, A; (iii) NaOH ; (iv) H_{3} O^{+}$
4. (4) $(i) M o_{2} O_{3}, ∆; (ii) C r O_{2} C l_{2}, H_{3} O^{+}; (iii) NaOH ; (iv) H_{3} O$
164.
Which of the following is a tricarboxylic acid?
1. (1) $Citric acid$
2. (2) $Malonic acid$
3. (3) $Succinic acid$
4. (4) $Malic acid$
165.
Which among the following is not dicarboxylic acid?
1. (1) $Malonic acid$
2. (2) $Caproic acid$
3. (3) $Glutaric acid$
4. (4) $Succinic acid$
166.
Find out the major product for the above reaction.
1. (1)
2. (2)
3. (3)
4. (4)
167.
An organic compound 'A' on reaction with $N H_{3}$ followed by heating gives compound B. Which on further strong heating gives compound C ( $C_{8} H_{5} N O_{2}$ ). Compound C on sequential reaction with ethanolic KOH, alkyl chloride and hydrolysis with alkali gives a primary amine. The compound A is :
1. (1)
2. (2)
3. (3)
4. (4)
168.
Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound. If water during the reaction is continuously removed the compound formed is generally known as
1. (1) $an amine$
2. (2) $an imine$
3. (3) $an enamine$
4. (4) $a Schiff's base$
169.
The compound formed when malonic acid is heated with urea is
1. (1) $cinnamic acid$
2. (2) $butyric acid$
3. (3) $barbituric acid$
4. (4) $crotonic acid.$
170.
Compound (A), C8H9Br, gives a white precipitate when warmed with alcoholic AgNO3. Oxidation of (A) gives an acid (B), C8H6O4. (B) easily forms anhydride on heating. Identify the compound (A).
1. (1)
2. (2)
3. (3)
4. (4)
171.
In a set of reactions propionic acid yielded a compound D
$CH_{3} CH_{2} COOH SOCl_{2} B NH_{3} C KOH Br_{2} D$
. The structure of $D$ would be
1. (1) $C H_{3} C H_{2} N H_{2}$
2. (2) $C H_{3} C H_{2} C H_{2} N H_{2}$
3. (3) $C H_{3} C H_{2} C O N H_{2}$
4. (4) $C H_{3} C H_{2} N H C H_{3}$
172.
The azo-dye $(Y)$ formed in the following reactions is Sulphanilic acid $+ NaNO_{2} + CH_{3} COOH \to X$
1. (1)
2. (2)
3. (3)
4. (4)
173.
Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
1. (1) $C H_{3} C H_{2} C H_{2} - C (= O) - C H_{3}$
2. (2) $C H_{3} C H_{2} C H_{2} - C (= O) - C H_{2} C H_{2} C H_{3}$
3. (3) $(H_{3} C)_{2} C (O H) (O C_{2} H_{5})$
4. (4) $(H_{3} C)_{2} C (O C_{2} H_{5})_{2}$
174.
In the following sequence of reactions $A L i A l H_{4} H_{3} O^{+} B O x i d a t i o n C_{4}$ -carboxylic acid, a compound A (molecular formula $C_{6} H_{12} O_{2}$ ) with a straight chain structure gives a $C_{4}$ carboxylic acid. A is :
1. (1) $carboxylic acid$
2. (2) $C H_{3} - C H_{2} - C H (O H) - C H_{2} - O - C H = C H_{2}$
3. (3) $C H_{3} - C H_{2} - C H_{2} - C O O - C H_{2} - C H_{3}$
4. (4) $C H_{3} - C H_{2} - C H_{2} - O - C H = C H - C H_{2} - O H$
175.
$Match List I withList II: (Chemical Reaction) (Reagent used)$
$List-I$ $List-II$
$(A) CH_{3} COOCH_{2} CH_{3}$ $(I) CH_{3} MgBr / H_{3} O^{+} \to CH_{3} CH_{2} OH (1.equivalent)$
$(B) CH_{3} COOCH_{3}$ $(II) H_{2} SO_{4} / H_{2} O$
$\to CH_{3} CHO (C) CH_{3} C \equiv N \to CH_{3} CHO (III) DIBAL- H / H_{2} O (D) (IV) SnCl_{2}, HCl / H_{2} O Choose the most appropriate match :$
1. (1) $A - II, B - IV, C - III, D - I$
2. (2) $A - IV, B - II, C - III, D - I$
3. (3) $A - II, B - III, C - IV, D - I$
4. (4) $A - III, B - II, C - I, D - IV$
176.
Compound A given below is :
1. (1) $antiseptic$
2. (2) $antibiotic$
3. (3) $analgesic$
4. (4) $pesticide$
177.
1. (1)
2. (2)
3. (3)
4. (4)
178.
In the above reaction product P is
1. (1)
2. (2)
3. (3)
4. (4) $C_{6} H_{5} - C (= O) - C_{6} H_{5}$
179.
'A' in the given reaction is
1. (1)
2. (2)
3. (3)
4. (4)
180.
In the following reaction A is :
1. (1)
2. (2)
3. (3)
4. (4)