The majority of crude oil, refined petroleum hydrocarbons (such as gasoline, diesel, kerosene, fuel oil and lubricating oil), coal tar, dyestuff, and pyrolysis waste products are hydrocarbons, which are compounds made solely of carbon and hydrogen. There are various forms of hydrocarbons. They can be divided into three main groups: (i) saturated hydrocarbons, (ii) unsaturated hydrocarbons, and (iii) aromatic hydrocarbons, depending on the types of carbon-carbon bonds that are present.
Download Class 11 Chemistry Worksheet on Chapter 13 Hydrocarbons – Set 4 PDF
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CBSE Class 11 Chemistry Chapter 13 Hydrocarbons – Set 4
Q-1: Which of the following reactions is used to determine the double bond position in unsaturated compounds?
a) Pyrolysis
b) Aromatisation
c) Hydrogenation
d) Ozonolysis
Q-2: Conformation arises due to rotation around
a) C-C double bond
b) C-C single bond
c) C-C triple bond
d) All of the above
Q-3: Which of the following happens in the Kharasch effect?
a) Free radical substitution
b) Electrophilic addition
c) Free radical addition
d) Nucleophilic addition
Q-4: C6H6 + X + AlCl3 → Toluene, X is
a) Acetic acid
b) Chloromethane
c) Acetone
d) Acetic anhydride
Q-5: Describe the procedure for making dihydrogen gas for industrial applications.
Q-6: Why are electrophilic reagents able to attack alkenes so quickly?
Q-7: How are alkynes distinguished from alkenes and alkanes? Describe using the reactions as support.
Q-8: Why are naphthalene balls used in toilets and for clothing preservation?
Q-9: a) Write the general formula for alkynes.
b) Write down the IUPAC name and structures of all alkynes having the molecular formula C5H8.
Q-10: What is the end result of passing propyne through a hot iron tube at 873 K?
Q-11: Which of the following is aromatic in nature?
Q-12: Write the products of the following reaction.
a) Hydrogenation of benzene at high temperatures and pressures in the presence of a Ni catalyst.
b) Chlorination of benzene in the presence of ultraviolet light.
c) Chlorination of benzene in the dark.
Q-13: Give any two methods for preparing ethyne.
Q-14: How do structural isomers and stereoisomers differ from each other?
Q-15: Why does cis isomer have a lower melting point than trans isomer?
Q-16: How can we discuss geometrical isomerism in the compounds where distinct atoms or groups of atoms are bound to the double-bonded carbon atoms?
Q-17: State the Saytzeff rule.
Q-18: What is Wurtz reaction? Give an example of the reaction.
Q-19: Define aromaticity using a few examples.
Q-20: a) Which polymer can be used as electrodes in batteries? And why?
b) What happens when acetylene is passed through dil. H2SO4 in the presence of HgSO4?
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