Aldehydes Ketones and Carboxylic Acids Test

Result

Aldehydes Ketones and Carboxylic Acids Test - 74

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Addition of alcohols to aldehydes in presence of anhydrous acid yield

A
Carboxylic acids

B
Ethers

C
Cyclic ethers

D
Acetals

Solution

Option D is correct.
Question 2
1 / -0

$$CH_3CONH_2\xrightarrow[]{NaNO_2IHCI}X$$

A
$$CH_3COOH$$

B
$$CH_3CO \overset{+}{N}H_3CI^{-}$$

C
$$CH_3NH_2$$

D
$$CH_3CHO$$

Solution

Amide, on treating with $$HNO_2$$ give acids.

$$CH_3CONH_2\xrightarrow[(h\nu)]{NaNO_2/HCl}CH_3COOH+N_2+H_2O$$
acetic acid
Question 3
1 / -0

Addition of alcohols to aldehydes in presence of anhydrous acid yield:

A
Carboxylic acids

B
Ethers

C
Cyclic ethers

D
Acetals

Solution

Alcohols are added to aldehydes and ketones in the presence of dry hydrogen chloride to form hemiacetals. This reaction can continue by adding another alcohol to form an acetal.

Hence, option $$D$$ is correct.
Question 4
1 / -0

Directions For Questions

Four isomeric optically active compounds $$\xrightarrow [ ]{ NaH{ CO }_{ 3 } } { CO }_{ 2 }(g)$$
$$(A,B,C,D)({C}_{4}{H}_{8}{O}_{3})$$
Compound $$(A)\xrightarrow [ ]{ LAH } (E)$$ (Achiral compound)
compound $$(B\xrightarrow [ or\\ Cr{ O }_{ 3 } ]{ KMn{ O }_{ 4 } } $$ Inert to oxidation
Compound $$(C)\xrightarrow [ ]{ NaOI/{ H }_{ 3 }{ O }^{ \oplus } } CH{ I }_{ 3 }$$ (Yellow ppt.)+Compound $$(F)$$

...view full instructions

Compound $$(A)$$ is:

A

B

C

D

Solution
Question 5
1 / -0

Directions For Questions

In above reaction

...view full instructions

Carboxylic acid $$(A)$$ is:

A

B

C

D
Both (a) and (c)

Solution

Formation of $$(E)$$ suggests monosubstituted acid and reaction of 1 mol of $${H}_{2}$$ with (A) and (B) shows one $$(C=C)$$ bond. There are 6 D.U (4 D.U for $$(Ph)$$ group, 1 D.U for $$(COOH)$$ and 1 D.U for $$(C=C)$$ in both (A) and (B)
Chiral compound with nine $$C$$ atoms would be (given figure)
Here $$(C)$$ and $$(D)$$ can be distinguished quantitatively by H.V.Z reaction. $$(C)$$ has one $$\alpha$$- H atoms and would give dichlorinated product. The chlorine content in the chlorinated derivaties of $$(C)$$ and $$(D)$$ is determined by quantitative methods
Question 6
1 / -0

$${CH}_{3}CH=CHCHO$$ is oxidised to $${CH}_{3}CH=CHCOOH$$ using:

A
Alkaline $$KMn{O}_{4}$$

B
Selenium dioxide

C
Ammoniacal $$Ag{NO}_{3}$$

D
All

Solution

Since alkaline $$KMnO_4$$ are powerful oxidizing agents, they can oxidize double bond also, to protect double bond, we use a mild oxidizing agent as $$Tollen's\ [Ag(NH_3)_2]+OH−$$ oxidizes $$CHO$$ to $$COOH$$ without affecting the $$(C=C)$$ bond. and $$Ag(0)$$ (mirror) is precipitated.
Question 7
1 / -0

Which of the following statements are correct?

A
Oximes are stronger acids than hydroxylamine

B
$$p{K}_{a}$$ of maleic acid is less than $$p{K}_{a}$$ of fumaric acid

C
$${Me}_{3}Si{CH}_{2}COOH$$ is a stronger acid than $${Me}_{3}C-{CH}_{2}COOH$$

D
o-Nitrobenzoic acid is a weaker acid than 3,5-dinitrobenzoic acid

Solution
Question 8
1 / -0

The decreasing order of $$ pK_a $$ value of the following is:

A
III>I>II

B
II>I>III

C
I>III>II

D
I>II=III

Solution

Stabler the $$C_B$$, stronger is the acidic strength (lower $$pK_a$$).

Therefore, the decreasing $$pK_a$$ value, (II) > (I) > (III). {Option (B) is correct}
Question 9
1 / -0

Five isomeric p-substituted aromatic compounds (A) to (E) with molecular formula $$C_8H_8O_2$$ are given for identification. Based on the following observation, give the structures of the compounds.
i. Both (A) and (B) form a silver mirror with Tollens reagent. (B) also gives a positive test with neutral $$FeCl_3$$ solution.
ii. (C) gives positive iodoform test.
iii. (D) is readily extracted in aqueous $$NaHCO_3$$ solution.
iv. (E) on acid hydrolysis gives 1,4 - dihydroxy benzene.
Compound (D) is:

A

B

C

D

Solution

Hence, Option "B" is the correct answer.
Question 10
1 / -0

Select the correct order in sequence in order to get the final product (E).

A
$$(X)\, (U) \, (Z) \, (W) \, (U/X),(Y)$$

B
$$(X) \,(U) \,(Z) \,(V) \,(U/X),(Y)$$

C
$$(X) \,(Z) \,(W) \, (U/X),(Y) \,(V)$$

D
$$(X) \,(Z) \,(W) \,(U) \,(V)$$

Solution

Hence, Option "C" is the correct answer.