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Grignard Reag...

Grignard Reagent for Alkenes

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Q. Hoffmann bromamide degradation reaction is shown by

$A r N H_{2}$
$A r C O N H_{2}$
$A r N O_{2}$
$A r C H_{2} N H_{2}$

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Q. The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is:

$C H_{3} C O C l / A l C l_{3} . B r_{2} / A l B r_{3}, H N O_{3} / H_{2} S O_{4}, Z n / H C l$
$C H_{3} C O C l / A l C l_{3}, Z n - H g / H C l, B r_{2} / A l B r_{3}, H N O_{3} / H_{2} S O_{4}$
$B r_{2} / A l B r_{3}, C H_{3} C O C l / A l C l 3, H N O_{3} / H_{2} S O_{4}, Z n / H C l$
$H N O_{3} / H_{2} S O_{4}, B r_{2} / A l C l_{3}, C H_{3} C O C l / A l C l_{3}, Z n - H g / H C l$

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Q. Propanal on treatment with dilute sodium hydroxide gives:

$C H_{3} C H_{2} C H_{2} C H_{2} C H O$
$C H_{3} C H_{2} C H (O H) C H_{2} C H_{2} C H O$
$C H_{3} C H_{2} C H (O H) C H (C H_{3}) C H O$
$C H_{3} C H_{2} C O O H$

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Q. In the reaction

C H_{3} C H_{3} N H_{2} + C H_{3} M g B r \to X,

.The product is :

$C H_{3} C H_{3}$
$C H_{3} C H_{2} C H_{3}$
$C H_{4}$
$C H_{3} C H_{2} C H_{2} C H_{2}$

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Q. The treatment of

C H_{3} M g X

with

C H_{3} - C \equiv C - H

produces:

$C H_{3} - C \equiv C - C H_{3}$
$C H_{3} - C H_{3} | C = C H_{2}$
$C H_{2} = C = C H_{2}$
$C H_{4}$

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Q. In which of the following reaction a primary amine with loss of carbon is produced?

$R - C O N H_{2} + N a O H B r_{2} \to$
$R - C O N H_{2} L i A l H_{4} \to$
$R - C O N H_{2} N a B H_{4} \to$
All of the above

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Q. What is the final product of the reaction sequence?

(C H_{3})_{2} C H C O O H (i) L i A l H_{4} ⟶ (i i) H_{2} O P B r_{3} ⟶ K C N ⟶ D M S O H_{2} O, H^{+} ⟶ H e a t

$(C H_{3})_{2} C H C H_{2} C H_{2} N H_{2}$
$(C H_{3})_{2} C H C H (B r) C O O H$
$(C H_{3})_{2} C = C H - C O O H$
$(C H_{3})_{2} C H C H_{2} C O O H$

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Q. Propylamine can be obtained from Hoffmann bromamide reaction by using which of the following amide?

Propanamide
Methanamide
Ethanamide
Butanamide

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Q. In the reaction

C H_{3} C H_{3} N H_{2} + C H_{3} M g B r \to X,

.The product is :

$C H_{3} C H_{3}$
$C H_{3} C H_{2} C H_{3}$
$C H_{3} C H_{2} C H_{2} C H_{2}$
$C H_{4}$

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Q.

C H_{3} C O O C_{2} H_{5} (a q) + N a O H (a q) ⟶ C H_{3} C O O N a (a q) + C_{2} H_{5} O H (a q)

Which one of the following statements is correct for the reaction?

Order is two but molecularity is one
Order is two and molecularity is two
Order is one but molecularity is two
Order is one and molecularity is one

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Q. Propylamine can be obtained from Hoffmann bromamide reaction by using which of the following amide?

Methanamide
Ethanamide
Propanamide
Butanamide

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Q. Which of the following will yield phenylhydrazine hydrochloride?

Benzene and hydrazine
Hydrazine and $H C l$
Benzenediazonium chloride and $S n C l_{2} / H C l$
Nitrobenzene and $S n C l_{2} / H C l$

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Q. In the reaction Y is :

(C H_{3})_{2} C O C H_{3} M g B r - ----- \to E t h e r X H_{2} O \to Y,

$C H_{3} C H_{2} O H$
$(C H_{3})_{3} C O H$
$C H_{3} O H$
$(C H_{3})_{2} C H O H$

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Q. In the following reaction, product ‘A’ is:

$C_{2} H_{5} C H_{2} C H O$
$C_{2} H_{5} C H_{2} C H_{2} O H$
$C_{2} H_{5} C H_{2} O H$
$C_{2} H_{5} C H O$

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Q. The treatment of

C H_{3} M g X

with

C H_{3} - C \equiv C - H

produces:

$C H_{3} - C \equiv C - C H_{3}$
$C H_{3} - C H_{3} | C = C H_{2}$
$C H_{2} = C = C H_{2}$
$C H_{4}$

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Q. How many H atoms are required for the reduction of nitrobenzene to aniline in acidic medium?

2
4
6
8

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Q. Which of the following will yield phenylhydrazine hydrochloride?

Benzene and hydrazine
Hydrazine and $H C l$
Benzenediazonium chloride and $S n C l_{2} / H C l$
Nitrobenzene and $S n C l_{2} / H C l$

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Q.

C H_{3} C H_{2} C l a q . K O H - ---- \to X K_{2} C r_{2} O_{7} / H^{+} - ------- \to Y

Which of the following opton(s) is/are correct?

X is ethanal
X is ethanol
Y is acetic acid
Y is ethanol

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Q. In the reaction

C H_{3} C H_{3} N H_{2} + C H_{3} M g B r \to X,

.The product is :

$C H_{3} C H_{3}$
$C H_{3} C H_{2} C H_{3}$
$C H_{3} C H_{2} C H_{2} C H_{2}$
$C H_{4}$

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Q.

3 C_{2} H_{5} O H + A \to C_{2} H_{5} B r + H_{3} P O_{3}

.Which of the following is A ?

$P B r_{3}$
$P B r_{5}$
$P O B r_{3}$
None of the above

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Q. We can obtain ethylamine by Hoffmann bromamide reation. The amide used in this reaction is:

Methanamide
Acetamide
Propanamide
Butanamide

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Q. Phenol on treatment with conc.

H N O_{3}

gives:

Picric acid
Ortho and meta-nitrophenols
Ortho and para-nitrophenols
None of the above

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Q. How many reagents from the followings occurs below Reaction:

i) \(H_3PO_2\)
ii) \(CH_3CH_2OH\)
iii) \(H_2O\)
iv) \(H_3PO_3\)
Me + N, a- Me

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Q.

In the given reaction, identify the compound A.

3 C_{2} H_{5} O H + P B r_{3} \to A + H_{3} P O_{3}

.

$C_{2} H_{5} B r$
$C H_{3} C_{2} H_{5} B r$
$C H_{2} C H_{2} C H_{2} C H_{2} - C l$
None of the above

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