Reduction of Alkyl Halide

Q.

By the reduction of alkyl halides, we get alkanes. The best alkyl halide is

1. Fluoride

2. Bromide

3. Chloride

4. Iodide

Q.

The addition of tetraethyl lead to petrol

1. Raise its octane no

2. may raises or lower the octane

3. no effect

4. lowers its octane no.

Q. Which of the following pairs of compound can be used as starting material in the synthesis of $\text{2-phenyl-2-pentanol}$?

1. $\text{PhBr and}C{H}_{3}C{H}_{2}C{H}_{2}COC{H}_3$
2. $(C{H}_3{)}_{2}CHC{H}_{2}Br\text{and}PhCOC{H}_3$
3. $C{H}_3(C{H}_2{)}_{2}C{H}_{2}Br\text{and}{C}_6{H}_{5}COOH$
4. $\text{PhBr and}(C{H}_3{)}_{2}CHC{H}_{2}COC{H}_3$

Q. The organic product formed in the reaction.
$C_6{H}_{5}COOH\stackrel{I.LiAl{H}_4}{\to }$

1. $C_6{H}_{5}C{H}_{2}OH$
2. $C_6{H}_{5}COOH$ & $C{H}_4$
3. $C_6{H}_{5}C{H}_3$ & $C{H}_{3}OH$
4. $C_6{H}_{5}C{H}_3$ & $C{H}_4$

Q. What is the correct sequence of reagents used for coverting nitrobenzene into m-dibromobenzene?

1. $\stackrel{NaN{O}_2}{⟶}/\stackrel{HCl}{⟶}/\stackrel{KBr}{⟶}/\stackrel{H^{+}}{⟶}$
2. $\stackrel{Sn/HCl}{⟶}/\stackrel{B{r}_2}{⟶}/\stackrel{NaN{O}_2}{⟶}/\stackrel{NaBr}{⟶}$
3. $\stackrel{B{r}_2/Fe}{⟶}/\stackrel{Sn/HCl}{⟶}/\stackrel{NaN{O}_2/HCl}{⟶}/\stackrel{CuBr/HBr}{⟶}$
4. $\stackrel{Sn/HCl}{⟶}/\stackrel{KBr}{⟶}/\stackrel{B{r}_2}{⟶}/\stackrel{H^{+}}{⟶}$

Q. How will you convert phenol to benzene?

Q.

Assertion: Chlorine can displace iodide ions from $\mathrm{KI}$ solution.

Reason: It is an example of a displacement reaction.

1. If both assertion and reason are true and the reason is the correct explanation of assertion.

2. If both assertion and reason are true but the reason is not the correct explanation of assertion.

3. If the assertion is correct but the reason is incorrect.

4. If the assertion is incorrect but the reason is correct.

Q. 32. Enol content of Cyclobutane 1, 3-dione and Cyclobutane 1, 2, 3-trione is: 1) B greater than A 2) A greater than B 3) A equals to B 4) A greater than B

Q. Propane cannot be prepared from which reaction-

1. 
2. 
3. None of these
4. 

Q. Reaction of acetaldehyde with ethylmagnesium bromide followed by hydrolysis will give:

1. Tertiary alcohol
2. Secondary alcohol
3. Ester
4. Ether

Q. Conversion of hexane into benzene involves the reaction of:

1. Hydration
2. Hydrogenation
3. Hydrolysis
4. Dehydrogenation

Q. Why in preparation of haloarenes when side chain is larger than methyl group why then , side chain halogenation mainly takes place at benzyllic carbon and notat any other carbon

Q. Choose the correct option(s) for the given sequence of reaction:

$C{H}_{3}C{H}_{2}C{H}_{2}CHO\stackrel{NaB{H}_4}{\to }X\stackrel{PC{l}_5}{\to }Y\underset{\left(ii\right)H^{+}}{\overset{\left(i\right)KCN}{\to }}Z$

1. $X$ is $C{H}_{3}C{H}_{2}C{H}_{2}COOH$
2. $X$ is $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$
3. $Z$ is $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}COOH$
4. $Z$ is $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$

Q. Arrange the above alkenes in increasing order of their heat of hydrogenation explaining the reason for your choice.

Q.

R-X can be reduced to R-H by Zn - Cu couple / C₂H₅OH as a result of:

1. Electron transfer from the metal to the substrate followed by H⁺ addition from the solvent

2. Hydride ion

3. Molecular activated hydrogen

4. All of the above

Q. Assertion :The rate of nitration of benzene is less than hexa deutero benzene.
Because Reason: Deuterium is an isotope of hydrogen.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect and Reason is correct

Q.
In the reaction, [X] will be :

1. ${\mathrm{LiAlH}}_4$
2. ${\mathrm{Bu}}_3\mathrm{SnH}$
3. All
4. ${\mathrm{NaBH}}_4$

Q. Which of the following reactions produce(s) propane as a major product?

1. 
2. 
3. 
4. 

Q. Upon hydrolysis, which of the following carbides evolve saturated hydrocarbon gas?

1. $Ca{C}_2$
2. $A{l}_4{C}_3$
3. $M{g}_2{C}_3$
4. $B{e}_{2}C$

Q. In Wurtz-Fittig reaction, phenol is reduced to benzene.

1. True
2. False

Q. Both alkane and alkene can be prepared from in one step reaction

1. Methyl Iodide
2. Ethyl Iodide
3. Iodoform

Q. Propan-1-ol can be prepared from propene through treatment with:

1. $C{H}_{3}COOH,H_{2}S{O}_4$
2. $Hg(OAc{)}_2{H}_{2}O$ followed by $NaB{H}_4$
3. $H_{2}O/H_{2}S{O}_4$
4. $B_2{H}_6$ followed by $H_2{O}_2$

Q. The reaction between carbonyl compound and $\alpha -bromoesters$ in the presence of metal $Zn$ to give $\beta -hydroxy$ ester is known as:

1. Clemmensen reduction
2. Reformatsky reaction
3. Wolff-Kishner reaction
4. Grignard reaction

Q. Reaction of ethyl bromide and silver acetate gives -

1. Ethyl ethanoate
2. Ethanoic anhydride
3. Methyl ethanoate
4. 2-Butanone

Q. The process involved in the formation of ethene from bromo ethane is :

1. hydrogenation
2. dehydrohalogenation
3. dehydration
4. both A and B

Q. $H_{2}C=C{H}_2+H_2\stackrel{Ni/{300}^{0}C}{\to }{C}_2{H}_6$ to get back the ethene, ethane must be:

1. heated ${170}^{0}C$ in the presence of conc. $H_{2}S{O}_4$
2. dehydrogenated in the presence of $Cu$ at ${300}^{0}C$
3. heated to ${750}^{0}C$
4. heated to ${450}^{0}C$ in the presence of $HN{O}_3$ vapoar

Q.
Major Product of reaction is:

1. 
2. 
3. 
4. All of these

Q. Which of the following alkenes is least reactive towards anionic polymerization?

1. ${CH}_2$ = ${CHCH}_3$
2. ${CH}_2$ =${CF}_2$
3. ${CH}_2$ $=CHCN$
4. ${CH}_2$ =${CHC}_6{H}_5$

Q. The halogen, chlorine of group 17 (VIIA) displaces bromine from potassium bromide. Give reason

Q. State whether the following statement is True or False:
Higher alkanes can be oxidised to fatty acids in presence of manganese stearate.

1. True
2. False