Skip to content
p.paperbanao.
Continue

Punjab (PTB) · Chapter test · Free

1st Year Chemistry Chapter 11 TestHydrocarbons

30 marks · 40 minutes · 21 questions. Covers: CHAP 11: Hydrocarbons.

Your school name

1st Year Chemistry Chapter 11 Test

1st Year · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. n-Butanol and diethyl ether are:

    1. Geometrical isomers

    2. Position isomers

    3. Chain isomers

    4. Functional group isomers

  2. In Ethene, each carbon atom is:

    1. Sp3 hybridized

    2. Sp2-hybridized

    3. Sp-hybridized

    4. Unhybridized

  3. Intermediate cyclic stage formed during the addition of bromine into ethene is:

    1. Bromide ion

    2. Bromonium ion

    3. Bromine

    4. Viccinal dibromide

  4. Product obtained after the ozonolysis of propene is/are:

    1. 2 mole of formaldehyde

    2. 2 moles of acetaldehyde

    3. Formaldehyde and acetaldehyde

    4. Propionaldehyde

  5. Point out a liquid among the following alkenes?

    1. Pentene

    2. Butene

    3. Propene

    4. Ethene

  6. n-hexane and 2-methyl pentane are examples of:

    1. Metamerism

    2. Chain isomerism

    3. Functional group isomerism

    4. Position isomerism

  7. What is the IUPAC name for the following compound?(eq)

    1. 1.3-Pentamethylpropane

    2. 1,1,3,3-Tetramethylbutane

    3. 2,4,4-Trimethylpentane

    4. 2,2,4-Trimethylpentane

  8. In the polymerization of ethene, mass of polythene produced is:

    1. Mass of ethene is greater than mass of polythene

    2. Mass of ethene is smaller than mass of polythene

    3. Mass of ethene is equal than mass of polythene

    4. All of these

  9. Carbocation is formed as a result of:

    1. Homolytic fission

    2. Heterolytic fission

    3. Either homolytic or heterolytic fission

    4. Neither homolytic nor heterolytic fission

  10. Aliphatic hydrocarbons are:

    1. Alkane

    2. Alkene

    3. Alkyne

    4. All of these

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. Write down name of the following compounds according to IUPAC-System. (i) CH2=CH-CH=CH2 (ii)CH2=C-CH2CH2CH3 (image) (iii) (CH2CH2)3CH

  2. Differentiate between open and closed chain hydrocarbons.

  3. Give the structures of (i) butane and isobutane, (ii) isopentane and neopentane.

  4. How can you convert ethyl bromide into ethane/alkene?

  5. Give examples of three chain isomers of pentane.

  6. Explain how inductive effects from alkyl groups stabilize carbocations in alkenes.

  7. Why alkenes show weakly polar properties?

  8. Give structures of 2,3-Dimethylpentane and 2,2,3,3-tetramethylbutane.

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Describe the free radical halogenation of methane using Cl2 as an example.

  2. Describe the mechanism of electrophilic addition of hydrogen halides to alkenes. Discuss Markovnikov’s rule in the context of hydrogen halide addition.

  3. Explain the rules of nomenclature of alkanes and cycloakanes in detail.