Hydrolysis of Cyanides

Q. Ethanol is converted into ethlyl chloride by reacting with

1. $C{l}_2$
2. $SOC{l}_2$
3. $HCl$
4. $NaCl$

Q. Predict the major product when 2 methylbut-2-ene is converted into following methods: 1.) Acid catalysed hydration 2.) Hydroboration by BH3-THF

Q. Hydrolysis of $C{H}_{3}C{H}_{2}CN$ will synthesize:

1. Ethanoic acid
2. Methanoic acid
3. Propanoic acid
4. Acetaldehyde

Q. The reaction C6H5CHO+ CH3CHO→ C6H5CH= CH-CHO is known as (a) Perkins reaction (b) Claisen condensation (c) Benzoin condensation (dCannizzaros reaction

Q. 9. Which of the following pathways produces 2-hexanone? (i) 1-Hexyne is treated with Hg2+/dil. H2SO4. (ii) 3-Methylhept-2-ene is treated with O3 followed by hydrolysis. (iii) n-butyl magnesium bromide reacts with acetaldehyde followed by hydrolysis and then oxidation with chromic acid. (iv) Hydroboration-oxidation of 1-hexyne.

Q. The end product B in the sequence of reactions $R-X\stackrel{C{N}^{-}}{\to }A\stackrel{NaOH}{\to }B$ is

1. A carboxylic acid

2. A ketone

3. An alkane

4. Sodium salt of carboxylic acid

Q. Which of the following on hydrolysis forms acetic acid

1. $C{H}_{3}CN$
2. $C{H}_{3}OH$
3. $C_2{H}_{5}OH$
4. $C_2{H}_{5}N{H}_2$

Q. Hydroboration of isobutylene followed by oxidative alkaline hydrolysis gives 1. 1 butanol 2. 2 butanol 3. Isobutyl alcohol 4(.CH3)C-OH

Q. $C{H}_{3}C{H}_{2}CO{O}^{-}N{a}^{+}\underset{\text{Heat}}{\overset{NaOH+?}{\to }}C{H}_{3}C{H}_3+N{a}_{2}C{O}_3$
Consider the above reaction and identify the missing reagent/chemical.

1. $DIBAL-H$
2. $CaO$
3. $B_2{H}_6$
4. Red phosphorus

Q. Hydrolysis of $C{H}_{3}C{H}_{2}CN$ will synthesise:

1. Ethanoic acid
2. Methanoic acid
3. Propanoic acid
4. Acetaldehyde

Q.

tert-Butyl alcohol, when heated with $H_{2}S{O}_4$, gives an alkene. Which of the following sequence will convert the alkene to 3-methylbutanoic acid?

1 - $H_3{O}^{+},$ hydrolysis

2 – treatment with $C{N}^{-}$

3 – $HBr,$ peroxide

1. 3; 2; 1

2. 2; 1; 3

3. 3; 1; 2

4. 1; 2; 3

Q. 37 An organic compound A molecular formula C8H16O2 on hydrolysis with dilute sulphuric acid gives a carboxylic acid B and an alcohol C .oxidation of C with chromic aci3 gives B . C on dehydration gives but -1-ene.identify A, B, C with arrowhead equations of the reactions.

Q. Acetonitrile on reduction with $LiAl{H}_4$ will give

1. $C{H}_{3}N{H}_2$
2. $C{H}_{3}C{H}_{2}N{H}_2$
3. $C{H}_{3}CH=NH$
4. $C{H}_{3}NHC{H}_3$

Q. Iodoform test is given by:

1. Methanol
2. 2 - butanol
3. 1 - butanol
4. 1 - propanol

Q. Which of the following will not give iodoform test

1. Ethanol
2. 2-propanone
3. Ethanal
4. 3-pentanone

Q. Which of the following does not answer iodoform test?

1. n-butyl alcohol
2. Sec-butyl Alcohol
3. Acetophenone
4. Acetaldehyde

Q. $C{H}_{3}C{H}_{2}CO{O}^{-}N{a}^{+}\underset{\text{Heat}}{\overset{NaOH+?}{\to }}C{H}_{3}C{H}_3+N{a}_{2}C{O}_3$
Consider the above reaction and identify the missing reagent/chemical.

1. Red phosphorus
2. $CaO$
3. $B_2{H}_6$
4. $DIBAL-H$

Q. Find out number of reactions in which carboxylic acid is obtained as a final product.
$i.Me-\stackrel{O}{\stackrel{||}{C}}-OEt\stackrel{H_3{O}^{+}}{\to }$
$ii.Me-\stackrel{O}{\stackrel{||}{C}}-O-\stackrel{O}{\stackrel{||}{C}}-Me\underset{ii.H_{2}O}{\overset{ii.LAH\left(excess\right)}{\to }}$
$iii.R-\stackrel{\oplus }{N}\equiv \stackrel{\ominus }{C}\stackrel{H_3{O}^{+}}{\to }$
$iv.Me-\stackrel{O}{\stackrel{||}{C}}-H\stackrel{PCC}{\to }$
$v.Me-\stackrel{O}{\stackrel{||}{C}}-\underset{O}{\underset{||}{C}}-Me\stackrel{HI{O}_4}{\to }$
$vi.C{H}_3-CH=CH-C{H}_{2}C{H}_3\underset{ii.H_2{O}_2}{\overset{i.O_3}{\to }}$

Q.

1. Reaction between CH₃MgBr with CO₂ followed by hydrolysis

2. Oxidation of ethanol with PCC in CH₂Cl₂

3. 
   

4. All the above

Q. Monosaccharides on reduction in the presence of hydrogen and platinum give corresponding ______.

1. acid
2. alditol
3. none of these
4. alcohol

Q. The correct order of increasing rate of hydrolysis of the following compound is ?

1. I < II < III
2. III < II < I
3. I < III < II
4. III < I < II

Q. When benzyl chloride is treated with ethanolic $KCN$, the major product formed is:

1. benzyl alcohal
2. benzyl isocyanide
3. benzyl cyanide
4. benzyl ethyl ether

Q. The end product B in the sequence of reactions $R-X\stackrel{C{N}^{-}}{\to }A\stackrel{NaOH}{\to }B$ is

1. An alkane

2. A carboxylic acid

3. Sodium salt of carboxylic acid

4. A ketone

Q. In the formation of alkene when alcoholic $KOH$ reacts with $C{H}_{3}C{H}_{2}Cl$. What is the attacking species in the reaction?

1. $C_2{H}_5{O}^{\ominus }$
2. $O{H}^{\ominus }$
3. $\stackrel{\oplus }{H_3}O$
4. $K^{\oplus }$

Q. 1– Chloro-butane on reaction with alc. KOH gives

1. 1 – butane
2. 1 – butanol
3. 2 – butane
4. 2 – butanol

Q. Assertion : Rate of ethanolysis of $1^o$ halide by $S_{N}1$ mechanism is fast.
Reason : Carbocation is stabilised by resonance.

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

Q. $C{H}_3-C\equiv CH\stackrel{HgS{O}_4}{\underset{dil.H_{2}S{O}_4}{\to }}\left(A\right)$
$C{H}_3-C\equiv CH\stackrel{\left(1\right)B{H}_3\cdot THF}{\underset{\left(2\right)H_2{O}_2/H{O}^{-}}{\to }}\left(B\right)$.
Product (A) and (B) is differentiated by.

1. $2-4$-DNP
2. $NaHS{O}_3$
3. Na-metal
4. NaOI

Q. Find out number of reactions in which carboxylic acid is obtained as a final product.
$i.Me-\stackrel{O}{\stackrel{||}{C}}-OEt\stackrel{H_3{O}^{+}}{\to }$
$ii.Me-\stackrel{O}{\stackrel{||}{C}}-O-\stackrel{O}{\stackrel{||}{C}}-Me\underset{ii.H_{2}O}{\overset{ii.LAH\left(excess\right)}{\to }}$
$iii.R-\stackrel{\oplus }{N}\equiv \stackrel{\ominus }{C}\stackrel{H_3{O}^{+}}{\to }$
$iv.Me-\stackrel{O}{\stackrel{||}{C}}-H\stackrel{PCC}{\to }$
$v.Me-\stackrel{O}{\stackrel{||}{C}}-\underset{O}{\underset{||}{C}}-Me\stackrel{HI{O}_4}{\to }$
$vi.C{H}_3-CH=CH-C{H}_{2}C{H}_3\underset{ii.H_2{O}_2}{\overset{i.O_3}{\to }}$

Q. (a) $Al\underset{N_2}{\overset{}{\to }}A$

1. Nitric oxide and acetylene.
2. None of the above
3. Ammonia and methane.
4. Ammonia and acetylene.

Q. an organic compound (A) reacts with ethanol to give (B) and (C). on hydrolysis (c) gives (B) and (D). oxidation of (d) gives (B). B is an acid and forms a salt with Ca(OH)2 which on dry distillation gives E, C3H6O. identify the compounds At to E and write all reactions involved