Grignard Synthesis

Q. Match List -I with List - II.
$\begin{array}{cccc}& \text{List-I}& & \text{List-II}\\ & \text{(Products formed)}& & \text{(Reaction of carbonyl}\\ & & & \text{compound with)}\\ \text{(a)}& \text{Cyanohydrin}& \text{(i)}& N{H}_{2}OH\\ \text{(b)}& \text{Acetal}& \text{(ii)}& RN{H}_2\\ \text{(c)}& \text{Schiff's base}& \text{(iii)}& \text{alcohol}\\ \text{(d)}& \text{Oxime}& \text{(iv)}& HCN\end{array}$
Choose the correct answer from the options given below.

Q. Phenyl magnesium bromide reacting with t-butyl alcohol gives:

1. $Ph-OH$
2. $Ph-H$
3. 
4. 

Q. An unknown alkyl halide (A) reacts with alcoholic KOH to produce a hydrocarbon $\left(C_4{H}_8\right)$. Ozonolysis of the hydrocarbon affords one mole of propionaldehyde and one mole of formaldehyde. Suggest which organic structure among the following is the correct structure of the above alkyl halide(A).

1. $C{H}_3(C{H}_2{)}_{3}Br$
2. $C{H}_{3}CH\left(Br\right)CH\left(Br\right)C{H}_3$
3. $C{H}_{3}C{H}_{2}CH\left(Br\right)C{H}_3$
4. $Br(C{H}_2{)}_{4}Br$

Q. Ethylamine reacts with nitrous acid to form:

1. Methyl alcohol
2. Ethyl alcohol
3. Ethane
4. Ethyl nitrite

Q. Identify compound X in the following sequence of reactions.

1. 
2. 
3. 
4. 

Q.

Which of the following compounds will not react with methyl magnesium bromide?

1. Acetone

2. Ethyl acetate

3. Dimethyl ether

4. Acetaldehyde

Q. Which of the following applies in the reaction, $C{H}_{3}CHBrC{H}_{2}C{H}_3\stackrel{alc.KOH}{⟶}C{H}_{3}CH=CHC{H}_3\text{(major product)}+C{H}_2=CHC{H}_{2}C{H}_3\text{(minor product)}$

1. 𝞫-Elimination reaction
2. Saytzeff's rule
3. Dehydrohalogenation
4. All of the above

Q. Reaction by which Benzaldehyde cannot be prepared:-

1. 
2. 
3. 
4. 

Q. Which of the following can react with all $Na,NaOH,NaHC{O}_3$?

1. 
2. 
3. 
4. All of the above

Q. The reagent required to convert 2-Chloro-2-methylbutane into 2-Methylbut -2-ene is

1. Alcoholic $NaOH$
2. Aqueous $NaOH$
3. Tert-butoxide/tert-butyl alcohol
4. Methanol

Q. When vicinal dibromide is heated with KOH in ethanol followed by sodamide $\left({200}^{\circ }C\right)$, double dehydrohalogenation takes place giving alkyne. Which of the following fails to give alkyne according to this procedure?

1. 
2. 
3. 
4. 

Q. In the formation of diazonium salt by reacting aliphatic amine with $NaN{O}_2$ and HX, the electrophile is

1. $N_2^{+}$
2. ${}^{+}N{O}_2$
3. $N\equiv O^{+}$
4. $N{H}_4^{+}$

Q. an alkyl halide on reaction with sodium in presense of ether gives 2, 2, 5, 5- tetramethyl hexane the alkyl halide possibly i

Q. Which of these methods would serve to prepare 1-Phenyl-2-propanol?
$\begin{array}{cc}\text{a.}& \text{Addition of benzyl Grignard reagent to acetaldehyde (ethanal)},\\ & \text{followed by hydrolysis.}\\ \text{b.}& \text{Addition of phenyl lithium to propylene oxide (methyloxirane)},\\ & \text{followed by hydrolysis.}\\ \text{c.}& \text{Addition of phenyl Grignard reagent to acetone (2- propanone)}\\ & \text{followed by hydrolysis.}\\ \text{d.}& \text{Acid- catalysed hydration (addition of water to) of 2-Phenyl-1-}\\ & \text{propene.}\\ \text{e.}& \text{Addition of methyl Grignard reagent to acetophenone (methyl phenyl}\\ & \text{ketone), followed by hydrolysis.}\\ \text{f.}& \text{Addition of methyl Grignard reagent to phenylacetaldehyde, followed}\\ & \text{by hydrolysis.}\end{array}$

1. $a,b,c,d,e,f$
2. $a,b,f$
3. $c,d,e$
4. $a,b,c,f$

Q. Addition of bromine on propene yields

1. 1, 2-dibromopropane
2. 2, 2-dibromopropane
3. 1, 1-dibromopropane
4. 1, 3-dibromopropane

Q. In the following reactions:

The major compound Y is:

1. 
   
2. 
3. 
4. 

Q. The strongest base in aqueous solution among the followingamines is(1) N-N-diethylethanamine(2)N-ethylethanamine (3)N-methylmethanamine (4)phenylmethanamine Aid with explanatio

Q. Methyl cyanide on reaction with sodium and $C_2{H}_{5}OH$ forms :

1. ethylamine
2. ethanoic acid
3. ethanimine
4. none of the above

Q. Among the following compounds, which one does not reacts with aniline to give acetanilide?

1. 
2. 
3. 
4. 

Q. Identify compound X in the following sequences of reactions.

1. 
2. 
3. 
4. 

Q. Which of the following is/are the best reagent(s) for the electrophilic nitration of benzene?

1. $dil.H_{2}S{O}_4$
2. $Conc.HN{O}_2$
3. $N{O}_2\text{and}AlC{l}_3$
4. $Conc.H_{2}S{O}_4\text{and}conc.HN{O}_3$

Q. Which one of the following nitro compounds does not react with nitrous acid ?

1. 
2. 
3. 
4. 

Q.

The product P in the reaction is:

1. 

2. 

3. 

4. 

Q. Which of the following organic compound(s) undergo carbylamine reaction?

1. $(C_2{H}_5{)}_{2}NH$
2. $C_2{H}_{5}N{H}_2$
3. $(C_2{H}_5{)}_{3}N$
4. $(C_2{H}_5{)}_4{N}^{+}{I}^{-}$

Q.
The product 'P' is

1. Benzyl chloride
2. Benzal chloride
3. Benzo chloride
4. Diphenyl methane

Q.

Which of the following compounds will not react with methyl magnesium bromide?

1. Dimethyl ether

2. Acetaldehyde

3. Ethyl acetate

4. Acetone

Q. Which of the following compounds will react with methyl magnesium iodide?

1. ${CH}_3{CH}_2{CH}_2{CH}_2{CH}_3$
2. ${CH}_{3}CH=CH-CH={CH}_2$
3. ${CH}_3{CH}_2{CH}_{2}C\equiv CH$
4. ${CH}_3-C\equiv C-{CH}_2{CH}_3$

Q.

Which of the following sequence of reactions would
convert tertiary butyl alcohol into 3, 3-dimethylbutan-1-ol?

1. 1: HBr followed by Mg in Ether; 2: Oxirane 3: $H_3{O}^{+}$
2. 1: HBr followed by Mg in Ether; 2: dioxane 3: $H_3{O}^{+}$
3. 1: $B{r}_2$ followed by Mg in Ether; 2: Oxirane 3: $H_3{O}^{+}$
4. None of the above

Q. In the given reaction
$C_6{H}_5-\stackrel{O}{\stackrel{||}{C}}-\stackrel{O}{\stackrel{||}{C}}-C_6{H}_5\frac{\left(i\right)C{H}_{3}MgBr\left(excess\right)}{\left(iii\right)HOH/H^{@}}Product$

Product will be:

$\left(a\right)C_6{H}_{5}C-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-C_6{H}_5$

$\left(b\right)C_6{H}_{5}C-\stackrel{OH}{\stackrel{|}{\underset{C{H}_3}{\underset{|}{C}}}}-\stackrel{O}{\stackrel{|}{C}}-C_6{H}_5$
$\left(c\right)C_6{H}_5-COOH$
$\left(d\right)C_6{H}_5-CHOH-CHOH-C_6{H}_5$

1. a
2. b
3. d
4. c

Q.

Which of the following sequence of reactions would
convert tertiary butyl alcohol into 3, 3-dimethylbutan-1-ol?

1. 1: $B{r}_2$ followed by Mg in Ether; 2: Oxirane 3: $H_3{O}^{+}$
2. 1: HBr followed by Mg in Ether; 2: Oxirane 3: $H_3{O}^{+}$
3. 1: HBr followed by Mg in Ether; 2: dioxane 3: $H_3{O}^{+}$
4. None of the above