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Classification and degree of unsaturation

27 questions on Classification and degree of unsaturation from the IUPAC Nomenclature and Structural Isomerism chapter: 7 NEET level, 11 JEE Main, 9 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All IUPAC Nomenclature and Structural Isomerism topics

Which of the following is an alicyclic compound? NEET level
Which of the following is a heterocyclic compound? NEET level
A primary (1 deg) carbon is bonded to only one other carbon atom. How many primary carbons are present in (CH3)3C-CH2-CH(CH3)2? NEET level
What is the degree of unsaturation (number of rings plus pi bonds) of a compound of molecular formula C6H6? NEET level
Which pair consists of members of the same homologous series (same functional group, formulas differing by one or more CH2 units)? NEET level
What is the degree of unsaturation of C4H5Br? NEET level
A quaternary carbon is a carbon bonded to four other carbon atoms. Which of the following alkanes contains one? NEET level
How many primary, secondary and tertiary carbon atoms, respectively, are present in CH3-CH(CH3)-CH(CH2-CH3)-CH2-CH2-CH3? JEE Main level
In (CH3)3C-CH(CH3)-CH2-CH3, what is the ratio of the number of primary : secondary : tertiary hydrogen atoms? JEE Main level
Which of the following molecular formulas corresponds to a degree of unsaturation of 5? JEE Main level
Calculate the degree of unsaturation (number of rings plus pi bonds) of a compound of molecular formula C10H11ClN2O2. Give the answer as an integer. JEE Main level
What is the degree of unsaturation of 4-ethenylcyclohexene? JEE Main level
Which of the following is NOT an aromatic compound? JEE Main level
The open-chain hydrocarbons that contain exactly one C=C and one CequivC bond form a homologous series. What is the general formula of this series? JEE Main level
Which of the following statements is/are correct? JEE Main level
For 3-methylpentane, CH3-CH2-CH(CH3)-CH2-CH3, which of the following statements is/are correct? JEE Main level
How many secondary (2 deg) carbon atoms are present in methylcyclohexane? JEE Main level
An open-chain (acyclic) hydrocarbon has the molecular formula C6H8. Which of the following CANNOT be its IUPAC name? JEE Main level
A hydrocarbon of formula C7H10 is completely hydrogenated over Pt. One mole of it takes up exactly 2 mol of H2 and gives a single saturated-type product of form... JEE Advanced level
Let P = hexa-1,3,5-triene, Q = ethenylbenzene (styrene), R = naphthalene and S = biphenyl (two benzene rings joined by a single bond). Which option arranges the... JEE Advanced level
Classify the carbon atoms of CH3-CH2-C(CH3)2-CH(CH3)-CH2-CH(CH3)-CH2-CH3 (a quaternary carbon is bonded to four carbons). How many primary, secondary, tertiary ... JEE Advanced level
Which of the following statements is/are correct? JEE Advanced level
For (CH3)2CH-C(CH3)2-CH2-CH2-CH3 (2,3,3-trimethylhexane), which of the following statements is/are correct? JEE Advanced level
A compound of formula C_xH_12ClN has a degree of unsaturation of 6. What is the value of x? JEE Advanced level
Which of the following statements is/are correct? JEE Advanced level
A monocyclic aromatic hydrocarbon (one benzene ring bearing only saturated alkyl substituents) has the general formula C_nH_2n-6 and a molar mass of 134 g/mol (... JEE Advanced level
An acyclic saturated hydrocarbon of formula C7H16 contains exactly one quaternary carbon (bonded to four carbons) and exactly one tertiary carbon; all its other... JEE Advanced level