Chemistry Practice MCQs Chapter 8 Class 12


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Created on By Ali Durrani

Chemistry Ch 8 Class 12 Hydrocarbons

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Benzene can be prepared from:

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Molecular Formula of Propane is:

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CH ≡ CH + 2AgNO3 -> AgC ≡ CAg + 2HNO3 represents _____ property of acetylene.

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Formula of propene is

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Catalytic hydrogenation of alkenes exhibits:

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Formula of Thionyl chloride is

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Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

PreMedPK MDCAT Mock 1
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Electrophile in sulphonation of benzene is:

PreMedPK MDCAT Mock 4
Chemistry
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Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

NTS 2013
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Which one of the following is saturated hydrocarbon?

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In the reaction, R-C≡C-R → the reagent used to convert alkyne into trans alkene is:

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KOLBE’s method is used to prepare?

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In which of the following cases are the benzene rings isolated?

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20 cm3 of a gaseous hydrocarbon was completely burnt in an excess of oxygen 60 cm3 of carbon dioxide and 40 cm3 of water vapours were formed, all volumes being measured at the same temperature and pressure. What is the formula of the hydrocarbon?

NTS 2015 SMBBMC
Chemistry
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H2 and Cl2 do not react in the dark, but in the presence of light a vigorous reaction is initiated due to the formation of:

NUMS 2016
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Catenation is a process in which carbon shows the properties of:

NTS 2010
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In alkanes all carbon atoms are linked by bond

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Which one of these is/are gasses?

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Which step should be repeated over and over to get a variety of substituted products?

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Physical properties of Ethyne is/are:

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Which one of the organic compounds Is the most reactive?

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Which one of the following molecules has the shortest distance of carbon atoms?

NTS 2013
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The addition of HBr to an unsymmetrical alkenes follows?

PreMedPK MDCAT Mock 2
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In which of the following C-C bond length is the minimum?

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The electrophilic reactions of Benzene are:

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What Is Lindlar Catalyst?

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Which of the following compounds possesses a single covalent bond between carbon and hydrogen?

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Acetylene with Cl2 gives:

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When CH3 is attached to the benzene ring, it makes the ring a:

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How many sigma groups are there in benzene?

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When CH2 = CH2 reacts with a halogen acid, the product formed is:

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Which among the following gives ppt. with terminal alkynyl hydrogen?

PreMedPK MDCAT Mock 4
Hydrocarbons
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The electrophilic reactions of Benzene are:

NTS 2011
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IUPAC Nomenclature of:

CH3 – CH = CH – CH2 – CH = CH2 is:

NTS 2011
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Electrophile in sulphonation of benzene is:

PMC 2020
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Benzene in the presence of AlCl3 produces acetophenone when reacts with:

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Alkanes having five to seventeen carbon atoms per molecule are:

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How many chain isomers are shown by C5H12?

PreMedPK MDCAT Mock 4
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Boiling point of heptane is:

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Which metal is used to form alkanes from alkyl halides?

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Generic formula of cycloalkane is:

PMC 2020
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Which type of isomerism depends on the distribution of carbon atoms on each side of the functional group?

PreMedPK MDCAT Mock 1
Chemistry
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Which gas among the following can be dried by bubbling in H2S04?

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Which one of the following has the least C — C bond length?

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Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent?

PreMedPK MDCAT Mock 4
Chemistry
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The general formula of Methane Dichloride is:

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How many chain isomers are shown by C5H12?

NTS 2018
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Which of the following compounds react slower than benzene in electrophilic substitution reaction?

PreMedPK MDCAT Mock 5
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Unsaturated Compound containing double bond is:

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Methane reacts with chlorine to form chloromethane. The catalyst used is?

NTS 2015 SMBBMC
Biology
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When CH3 is attached to the benzene ring, it makes the ring a:

PMC 2020
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Benzene can be prepared from:

NTS 2011
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The IUPAC name of the compound having structural formula CH3 — CH(OH) —COON is:

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The major source of unburnt hydrocarbons in the atmosphere is / are:

NUMS 2016
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) If 2-butene is treated with KMn04, the product is:

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Percentage of butane in Sui gas is?

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Which of the following compounds possesses a single covalent bond between carbon and hydrogen?

NUMS 2016
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1,4-dimethyl benzene is called as ______.

PreMedPK MDCAT Mock 5
Chemistry
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Which one of the following molecules has the shortest distance of carbon atoms?

PreMedPK MDCAT Mock 3
Chemistry
Hydrocarbons
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In Alkenes the Carbon atoms are connected to each other by a

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20 cm3 of a gaseous hydrocarbon was completely burnt in an excess of oxygen 60 cm3 of carbon dioxide and 40 cm3 of water vapours were formed, all volumes being measured at the same temperature and pressure. What is the formula of the hydrocarbon?

PreMedPK MDCAT Mock 5
Chemistry
Hydrocarbons
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Sp hybridization is found In which of the following?

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