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101.

What are `ul(A), ul(B),ul(C)` in the following reactions ? (I) `(CH_(3)CO)_(2)Caoverset(Delta)ul(A)` `II. CH_(3)CO_(2)H overset(HI)underset(Red P)toul(b)` (III) `2CH_(3)CO_(2)H overset(P_(4)O_(10))toul(C)`A. `{:(A,B,C),(C_(2)H_(6),CH_(3)COCH_(3),(CH_(3)CO)_(2)O):}`B. `{:(A,B,C),((CH_(3)CO)_(2)O,C_(2)H_(6),CH_(3)COCH_(3)):}`C. `{:(A,B,C),(CH_(3)COCH_(3),C_(2)H_(6),(CH_(3)CO)_(2)O):}`D. `{:(A,B,C),(CH_(3)COCH_(3),(CH_(3)CO)_(2)O,C_(2)H_(6)):}`

Answer» Correct Answer - 3
Discussion
102.

Which mechanism is not seen during the hydrolysis of ester?A. `A_(AC_(2))`B. `A_(AC_(1))`C. `A_(AL_(2))`D. `A_(AL_(1))`

Answer» Correct Answer - C
`A_(AL^(2))` is not found during ester hydrolysis as `H_(2)O` is a poor nucleophile.
Discussion
103.

The acid present in red ants isA. HCOOHB. `C_(6)H_(5)CO OH`C. `CH_(3)CO OH`D. `CH_(3)-overset(OH)overset(|)(CH)-CO OH`

Answer» Correct Answer - 1
Formica means red ant
Discussion
104.

How will you prepare hippuricated from Benzoylchloride ?

Answer» Hippuric acid is benzoyl glycine and is prepared by the action of benzoyl chloride with glycine in 10% NaOH. The benzolation of phenols or amines with benzoyl-chloride in presence of cold aqueous NaOH is known as schotten Bauman reaction.
`H_(2)NCH_(2)CO OH+C_(6)H_(5)COCl+NaOH to underset("Hippuric acid")underset("Benzoylglycine")(C_(6)H_(5)CONHCH_(2)CO OH+NaCl+H_(2)O)`
Discussion
105.

Which of the following does not undergo Hell-Volhard Zelinsky reaction?A. HCOOHB. `C Cl_(3)CO OH`C. `C_(6)H_(5)CO OH`D. All

Answer» Correct Answer - D
none of these contains alpha H atom
Discussion
106.

The correct acidity order of the following is: A. `igtiiigtiigtIv`B. `iiigtigtivgtii`C. `ivgtigtiiigtii`D. `igtiigtiiigtiv`

Answer» Correct Answer - d
Order of acidic nature
Discussion
107.

What is the product of the reaction of propenoic acid with ethyl lithium followed by acid hydrolysis?A. Dipropyl ketoneB. Diethyl ketoneC. Ethyl isopropyle ketoneD. Ethyl propyle keton

Answer» Correct Answer - b
Discussion
108.

Reagent used to convert `Me-overset(O)overset(||)C-NH_(2) rarr Me-NH_(2)`A. NaOHB. MnOC. KOBrD. conc. `H_(2)SO_(4)`

Answer» Correct Answer - C
`Me-overset(O)overset(||)C-NH_(2)underset(KOBr)overset(KOH//Br_(2)"or")rarrMe-NH_(2)`
The reaction is Hoffmann bromamide reaction.
Discussion
109.

The general formula of `C_(n)H_(2n)O_(2)` could be for open chainA. an acidB. a diketoneC. an etherD. an aldehyde

Answer» Correct Answer - 1
`C_(n)H_(2n+1)CO OH` or `C_(n) H_(2n) O_(n)`
Discussion
110.

In the anion `HCOO^-` , the carbon-oxygen bonds are found to be of equal length. This is due to :A. The anion `HCO O^(-)` has two equivalent resonating strucutresB. The anion is obtained by removal of a proton from the acid moleculesC. Electronic orbitals of carbon atom are hybridisedD. The C=O bond is weaker than the C-O bond

Answer» Correct Answer - 1
Discussion
111.

Product (A) of above reaction is :A. `Ph-Ph-overset(O)overset(||)C-CH_(3)`, Hoffmann bromamide reactionB. `CH_(3)-NH-overset(O)overset(||)C-Ph`, Beckmann rearrangementC. `Ph-overset(O)overset(||)C-NH-CH`, Hoffmann bromamide reactionD. `Ph-NH-overset(O)overset(||)C-CH_(3)`"Beckmann rearrangement"

Answer» Correct Answer - B
Only anti group migrates during Beckman rearrangement.
Discussion
112.

`CH_(3)-overset(O)overset(||)C-CH_(3)overset(CH_(2)N_(2))rarr(X)overset(SeO_(2))rarrunderset(("major"))((Y))overset(m-CPBA)rarr(Z)` Product (Z) is :A. `CH_(3)-overset(O)overset(||)C-O-CH_(3)`B. `CH_(3)-overset(O)overset(||)C-O-overset(O)overset(||)C-CH_(3)`C. `CH_(3)-CH_(2)-overset(O)overset(||)C-O-CH_(3)`D. `CH_(3)-underset(O)underset(||)C-underset(O)underset(||)C-O-CH_(3)`

Answer» Correct Answer - B
X is `CH_(3)overset(O)overset(||)C-CH_(2)CH_(3)` y is `CH_(3)-overset(O)overset(||)C-overset(O)overset(||)C-CH_(3)`
Z is `CH_(3)-overset(O)overset(||)C-O-overset(O)overset(||)C-CH_(3)` by Bayer Villiger oxidation
Discussion
113.

Which of the following will give HVZ reaction?A. PhCOOHB. MeCOOHC. HCOOHD. `Me_(3)C-COOH`

Answer» Correct Answer - D
Hell-Volhard Zelinsky reaction (`alpha`-halogenation of carboxylic acid)
(a), (c ) and (d) do not have `alpha-H`.
Discussion
114.

Correct order of reactivity of following acid derivatives is : MeCOCI `MeCON_(3)` MeCOOCOMe MECOOMeA. `P gtQ gtR gtS`B. `Q gtP gtR gtS`C. `P gtR gtS gtQ`D. `Q gtP gtS gtR`

Answer» Correct Answer - A
`"Rate" prop S^(+)` on `overset(O)overset(||)C`
Discussion
115.

The organic product formed in the reaction `C_(6)H_(5)CO OH overset(1. LiAlH_(4))underset(2. H_(2)O^(+)) to `A. `C_(6)H_(5)CH_(2)OH`B. `C_(6)H_(5)CO OH & CH_(4)`C. `C_(6)H_(5)CH_(3) & CH_(3)OH`D. `C_(6)H_(5)CH_(3) & CH_(4)`

Answer» (A) `LiAlH_(4)` is reducing agent. It reduces -COOH group to `-CH_(2)OH` group.
`C_(6)H_(5)CO OH overset(LiAlH_(4))toC_(6)H_(5)CH_(2)OH`
Discussion