alleryStart learning →Which n-alkane gives toluene on aromatisation?
- n-Heptane
- n-Octane
- n-Hexane
- n-Pentane
Show answer and solution
Correct answer: A. n-Heptane
Toluene has seven carbons, so cyclisation and dehydrogenation of n-heptane forms it.
MHT-CET Hydrocarbons — practice questions — page 2
Explore 90 free Hydrocarbons questions in MHT-CET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
Practise Hydrocarbons with Quill →Hydrocarbons questions and exercises with answers
Showing questions 31–60 of 90.
Which n-alkane gives toluene on aromatisation?Read the answer and worked solution →Breaking higher alkanes into smaller molecules by heat is:Read the answer and worked solution →Arrangements interconverted by rotation about a C-C single bond are:Read the answer and worked solution →Energy difference between staggered and eclipsed ethane is about:Read the answer and worked solution →In which projection is the rear carbon drawn as a circle?Read the answer and worked solution →Alkenes are called olefins, a name meaning:Read the answer and worked solution →The pi bond of C=C is weaker than its sigma bond because of:Read the answer and worked solution →Bond enthalpy of the C≡C bond in ethyne is about:Read the answer and worked solution →Loosely held pi electrons make alkenes react mainly with:Read the answer and worked solution →Methene is short lived. The first stable alkene is:Read the answer and worked solution →But-1-ene and but-2-ene are an example of:Read the answer and worked solution →Cis-trans isomerism in alkenes arises because:Read the answer and worked solution →In a cis alkene, the two identical groups lie:Read the answer and worked solution →trans-But-2-ene has nearly zero dipole moment because:Read the answer and worked solution →Compared with the cis isomer, a solid trans alkene usually has:Read the answer and worked solution →Partial hydrogenation of an alkyne over Lindlar's catalyst gives:Read the answer and worked solution →Reducing an alkyne with sodium in liquid ammonia gives:Read the answer and worked solution →For dehydrohalogenation with alcoholic KOH, the halogen order is:Read the answer and worked solution →Dihalides with halogens on adjacent carbon atoms are called:Read the answer and worked solution →Vicinal dihalides heated with zinc metal give:Read the answer and worked solution →Alcohols heated with concentrated H2SO4 form alkenes by:Read the answer and worked solution →Ethene is a colourless gas with:Read the answer and worked solution →Reactivity of hydrogen halides towards alkenes follows:Read the answer and worked solution →By Markovnikov's rule, the negative part of the adding molecule goes to the carbon with:Read the answer and worked solution →Propene with HBr and no peroxide gives mainly:Read the answer and worked solution →Anti-Markovnikov addition of HBr with peroxide is called the:Read the answer and worked solution →The peroxide effect does not occur with HCl because:Read the answer and worked solution →Propene with water and a little concentrated H2SO4 gives mainly:Read the answer and worked solution →In ozonolysis, the ozonide is cleaved using:Read the answer and worked solution →Ozonolysis of but-2-ene gives:Read the answer and worked solution →
Worked practice questions
Breaking higher alkanes into smaller molecules by heat is:
- Hydrolysis
- Polymerisation
- Pyrolysis
- Isomerisation
Show answer and solution
Correct answer: C. Pyrolysis
Thermal decomposition of alkanes into smaller fragments is called pyrolysis or cracking.
Arrangements interconverted by rotation about a C-C single bond are:
- Configurations
- Conformations
- Tautomers
- Enantiomers
Show answer and solution
Correct answer: B. Conformations
Spatial forms reached just by rotating about a sigma bond are conformers or rotamers.
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