Reaction of Alcohols with Phosohorus Halides

Q.

Draw the structures of major monohalo products in each of the following reactions:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Q.

Starting from Aniline how will you prepare Benzene Diazonium Chloride?

Q. In the following reaction sequence, the correct structure(s) of X is/are:

1. 
2. 
3. 
4. 

Q.

In the following reaction sequence, [C] is:

1. 4, 4"-dimethylbiphenyl

2. 

3. 

4. 

Q. Iodoethane is treated with Alcoholic KCN and the product obtained is hydrolysed with dil. HCl. The final product is

1. Propane Nitrate
2. Butanoic acid
3. Propanoic acid
4. Propanamide

Q.

Is diethyl ether acidic or basic?

Q. Ethylethanoate on reduction with $LiAl{H}_4$ gives

1. Butanol
2. Ethanol
3. Ethanoic acid, ethanol
4. Ethanol, propanol

Q. for a chemical reaction, 2A+2B→ C+D, the order of reaction is one with respect tonA and one with respect to B. the initial rate of reaction is 4×10^{-2}mol/lit/se when 50 percent of reac†an t are converted into product, the rate of reaction aould become

Q. In the reaction sequence:

The major products X and Y respectively are:

1. 
2. 
3. 
4. 

Q. What is controlled chain reaction and uncontrolled chain reaction explain by process

Q. A compound $\left(x\right)$ on treatment with $Na$ gives $\left(y\right)$, and with $PC{l}_5$ gives $\left(z\right)$.$\left(y\right)$ and $\left(z\right)$ react together to form diethyl ether.
$\left(x\right),\left(y\right)$ and $\left(z\right)$ respectively are:

1. $C_2{H}_{5}OH,C_2{H}_6,C_2{H}_{5}Cl$
2. $C_2{H}_{5}OH,C_2{H}_{5}Cl,C_2{H}_{5}ONa$
3. $C_2{H}_{5}Cl,C_2{H}_6,C_2{H}_{5}OH$
4. $C_2{H}_{5}OH,C_2{H}_{5}ONa,C_2{H}_{5}Cl,$

Q. Primary alcohols are obtained by the action of Grignard Reagent with

1. $C{H}_{3}COC{H}_3$
2. $C{H}_{3}CHO$
3. $HCHO$
4. $C{H}_{3}C{H}_{2}CHO$

Q.

Methyl alcohol when reacted with CO using cobalt or Rhodium as catalyst, compound (A) is formed. (A) on heating with HI in presence of red phosphorous as catalyst gives (B). Identify (B)

1. $C{H}_{3}COOH$
2. $C{H}_{3}CHO$
3. $C{H}_{3}C{H}_{2}I$
4. $C{H}_{3}C{H}_3$

Q.

A solid which bursts into flames on the addition of concentrated Nitric acid is:

1. Sawdust

2. Turpentine oil

3. Alcohol

4. Ferric sulphate

Q. Select the correct options with respect to the reaction of cis-3-methylcyclopentanol with $P/I_2$:

1. The reaction is $S_{N}1$
2. The reaction is $S_{N}2$
3. The substrate is optically active
4. The product is optically active

Q. Which statements is/are correct about the conformer of cis and trans $1,1,3,5-$tetramethyl cyclohexane?

1. Cis isomer is more stable than trans isomer.
2. Trans isomer is more stable than cis isomer.
3. There are two $1,3-Me/H$ diaxial interactions in cis isomer.
4. There are two $1,3-Me/H$ and $1,3-Me/Me$ diaxial interactions in trans isomer.

Q. Assume common laboratory reagents and chemicals are available. Starting with cyclopentanol and any other alcohol(s) each having not more than 4 carbons, synthesize:

1. One of steps will involve the formation of Carbon-Carbon sigma bond
2. One of steps must involve the formation of Carbon-Carbon pi bond
3. One of the steps involve addition across the carbonyl pi bond
4. Organometallics and alkyl halides will likely be used

Q. Select the correct options with respect to the reaction of cis-3-methylcyclopentanol with $PB{r}_3$:

1. The reaction is $S_{N}2$
2. The reaction is $S_{N}1$
3. The product is optically active
4. The product is racemic

Q. Compound 'A' reacts with $PC{l}_5$ to give 'B' which on treatment with KCN followed by hydrolysis gave propanoic acid as the product. What is 'A'?

1. Propane
2. Ethyl chloride
3. Ethane
4. Ethyl alcohol

Q. Which of the following is a chromophore of azodyes?

1. $>C=O$
2. $NO$
3. $-N\equiv N-$
4. $-{NO}_2$

Q. Intra molecular hydrogen bonding is present in –

1. HCl
2. Benzophenone
3. M-nitrophenol
4. Salicyladehyde

Q. Methyl bromide + Potassium hydroxide $\to$ ?

Q. Ethanol when reacted with $PC{l}_5$ gives (A), $POC{l}_3$ and $HCl$. (A) reacts with silver nitrite to form (B) (major product) and $AgCl$. (A) and (B) are respectively.

1. $C_2{H}_6$ and $C_2{H}_{5}O{C}_2{H}_5$
2. $C_2{H}_{5}Cl$ and $C_2{H}_{5}N{O}_2$
3. $C_2{H}_6$ and $C_2{H}_{5}N{O}_2$
4. $C_2{H}_{5}Cl$ and $C_2{H}_{5}O{C}_2{H}_5$

Q. Assume common laboratory reagents and chemicals are available. Starting with cyclopentanol and any other alcohol(s) each having not more than 4 carbons, synthesize:

1. One of steps will involve the formation of Carbon-Carbon sigma bond
2. One of steps must involve the formation of Carbon-Carbon pi bond
3. One of the steps involve addition across the carbonyl pi bond
4. Organometalics and alkyl halides will likely be used.

Q. The compound $A$ on treatment with $Na$ gives $B$ and with $PC{l}_5$ gives $C.$ $B$ and $C$ react together to give diethyl ether. $A,B$ and $C$ are in the order:

1. $C_2{H}_{5}Cl,C_2{H}_6,C_2{H}_{5}OH$
   
2. $C_2{H}_{5}OH,C_2{H}_6,C_2{H}_{5}Cl$
   
3. $C_2{H}_{5}OH,C_2{H}_{5}ONa,C_2{H}_{5}Cl$
   
4. $C_2{H}_{5}OH,C_2{H}_{5}Cl,C_2{H}_{5}ONa$
   

Q. The product formed on reaction of ethyl alcohol with bleaching Powder is

1. $CHC{l}_3$
2. $C{H}_{3}COC{H}_3$
3. $CC{l}_{3}CHO$
4. $C{H}_{3}CHO$

Q. Glucose, mannose and fructose give identical osazones.

If true enter 1, if false enter 0.

1. 1

Q. 1-Methylcyclopentene can be converted into the given compound by the use of which of the following reagents?

1. $B{D}_3$ followed by HCOOH
2. $B{H}_3$ followed HCOOD
3. $B{D}_3$ followed by HCOOD
4. $B{H}_3$ followed by DCOOH

Q. Identify the product of the following reaction.
$ClC{H}_{2}C{H}_{2}C{H}_{2}Br+KCN\to Product$

1. $ClC{H}_{2}C{H}_{2}C{H}_{2}CN$
2. $CNC{H}_{2}C{H}_{2}C{H}_{2}CN$
3. $CNC{H}_{2}C{H}_{2}Br$
4. $C{H}_{3}C{H}_{2}C{H}_{2}Br$

Q. The compound A on treatment with $Na$ gives B, and with $PC{l}_5$ gives C. B and C react together to give diethyl ether. A, B and C are in the order :

1. $C_2{H}_{5}Cl$, $C_2{H}_6$, $C_2{H}_{5}OH$
2. $C_2{H}_{5}OH$, $C_2{H}_{5}Cl$, $C_2{H}_{5}ONa$
3. $C_2{H}_{5}OH$, $C_2{H}_6$, $C_2{H}_{5}Cl$
4. $C_2{H}_{5}OH$, $C_2{H}_{5}ONa$, $C_2{H}_{5}Cl$