Ozonolysis

Q.

An alkene ‘A’ on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of ‘A’

Q.

Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain.

Q.

Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
(i) Pent-2-ene

(ii) 3, 4-Dimethyl-hept-3-ene

(iii) 2-Ethylbut-1-ene

(iv) 1-Phenylbut-1-ene

Q.

Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?

Q.

Predict the major product of acid catalysed dehydration of

(i) 1-methylcyclohexanol and

(ii) butan-1-ol

Q. Which of the following compounds will undergo Cannizzaro reaction?

1. $C{H}_{3}CHO$
2. $C{H}_{3}COC{H}_3$
3. $C_6{H}_{5}CHO$
4. $C_6{H}_{5}C{H}_{2}CHO$

Q.

An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.

Q. Ozonolysis of which one of the following will give two molecules of acetaldehyde

1. 1-pentene
2. 2-pentene
3. None of these
4. 1-butene
5. 2-butene

Q.

Position of double bond in an organic compound is determined by

1. Hydrogenation
2. Ozonolysis
3. Oxidation
4. Reduction

Q.

Write IUPAC names of the products obtained by the ozonolysis of the following compounds:

(i) Pent-2-ene (ii) 3, 4-Dimethyl-hept-3-ene

(iii) 2-Ethylbut-1-ene (iv) 1-Phenylbut-1-ene

Q. One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of $44u$. The alkene is:

1. But-1-ene
2. Ethene
3. Propene
4. But-2-ene

Q. Ozonolysis of 2-methyl butene-2 yields

1. Only aldehyde
2. Only ketone
3. Both aldehyde and ketone
4. None of these

Q. On reductive ozonolysis, ethylene gives:

1. ketone
2. aldehyde
3. carboxylic acid
4. ether

Q.

Carry out the following conversion

1). Ethanoic anhydride to ethanol.

2).Ethyl propanoate to ethanol.

3) Ethyl propanoate to propanol.

4).Ethanol to propane nitrite

Q. In the products of ozonolysis, there are acetone and formaldehyde, what is the initial compound ?

1. 
2. 
3. 
4. None of the above

Q. A hydrocarbon of formula $C_6{H}_{10}$ absorbs only one molecule of $H_2$ upon catalytic hydrogenation. Upon ozonolysis the hydrocarbon yields :

$O=\stackrel{H}{\stackrel{|}{C}}-C{H}_2-C{H}_2-C{H}_2-C{H}_2-\stackrel{H}{\stackrel{|}{C}}=O$. The hydrocarbon is:

1. Cyclohexane
2. Benzene
3. Cyclohexene
4. Cyclobutane

Q. an alkene on reaction with acidified KMnO4 gives 4-oxo pentanoic acid the alkene is 1.pentene 2.2-pentene 3.1-methyl cyclobutene 4.1, 2-dimethylcyclopropane

Q. The total number of chiral molecules formed from one molecule of $P$ on complete ozonolysis $(O_3,Zn/H_{2}O)$ is.

Q. An alkene on ozonolysis gave acetaldehyde.The alkene is

1. Ethylene
2. Propene
3. 1-butene
4. 2-­butene

Q.

Ethyl alcohol on oxidation with acidified potassium permanganate gives:

1. Formic acid

2. Acetic acid

3. Acetaldehyde

4. Formaldehyde

Q. The ozonolysis products of an olefin are $OHC-CHO$ and $OHC-C{H}_2-C{H}_2-CHO$, the olefin is:

1. 
2. 
3. 
4. 

Q. Ozonolysis of which one of the following will give two molecules of acetaldehyde

1. 1-butene
2. 2-butene
3. 1-pentene
4. 2-pentene
5. None of these

Q.

What is the structural formula of cyclohexane?

Q. Ethylene reacts with ozone to give

1. Formaldehyde
2. Ethyl alcohol
3. Acetaldehyde
4. Ozonide

Q.

Explain photolysis.

Q.

2 - acetoxy benzoic acid is

1. Mordant dye

2. Aspirin

3. Antiseptic

4. Antibiotic

Q. $\text{2, 3-Dimethylbut-2-ene}\underset{\left(ii\right)Zn/H_{2}O}{\overset{\left(i\right)O_3/CC{l}_4}{\to }}P$
Product 'P' in the reaction given will be:

1. $C{H}_3-\stackrel{O}{\stackrel{||}{C}}-H$
2. $C{H}_3-\stackrel{O}{\stackrel{||}{C}}-C{H}_3$
3. $C{H}_3-C{H}_2-\stackrel{O}{\stackrel{||}{C}}-C{H}_3$
4. $H-\stackrel{O}{\stackrel{||}{C}}-H$

Q. What is the common name for C6H4ClCOCH3 ? (Cl is attached at Ortho position on benzene ring)

Q.

The alkene which on ozonolysis yields acetone is

1. $(C{H}_3{)}_{2}C=C(C{H}_3{)}_2$
2. $C{H}_3-CH=CH-C{H}_3$
3. $C{H}_2=C{H}_2$
4. $C{H}_3-CH=C{H}_2$

Q. Which of the following compounds produce 1, 5-cyclooctanedione on ozonolysis?

1. 
2. 
3. 
4.