Free Test Isomerism – NEET

Q1: Which of the following is a position isomer of butanol?

A. Butan-1-ol B. Butanal C. 2-methylpropan-2-ol D. Butanoic acid

Q2: Which compound exhibits functional group isomerism with C₂H₆O?

A. Ethanol B. Methoxymethane C. Dimethyl ether D. Propanol

Q3: Which pair represents chain isomers?

A. Pentane and 2-methylbutane B. Butanol and Butanal C. Ethanol and Dimethyl ether D. Acetone and Propanal

Q4: Cis-trans isomerism is not shown by:

A. But-2-ene B. Pent-2-ene C. But-1-ene D. 2-butene-2-ol

Q5: Which is a metamers pair?

A. CH3-O-C2H5 and C2H5-O-CH3 B. C3H7OH and CH3CH2CH2OH C. CH3COOH and HCOOCH3 D. CH3CHO and CH3COCH3

Q6: Optical isomerism arises due to:

A. Geometrical difference B. Presence of a chiral center C. Change in position of double bond D. Chain branching

Q7: Which is not an example of structural isomerism?

A. Butane and 2-methylpropane B. Ethanol and Dimethyl ether C. But-2-ene and But-1-ene D. Glucose and Fructose

Q8: Which of the following compounds show tautomerism?

A. Acetone B. Ethene C. Acetaldehyde D. Phenol

Q9: Enantiomers have:

A. Same physical and chemical properties B. Different boiling points C. Same optical activity direction D. Same reactivity with all reagents

Q10: Diastereomers differ in:

A. Only optical activity B. All physical properties C. Only molecular formula D. Functional group

Q11: Which is an example of geometrical isomerism?

A. 2-butene B. Butane C. Ethanol D. Methane

Q12: Structural isomers have:

A. Same connectivity of atoms B. Different molecular formulas C. Different connectivity of atoms D. Different atoms

Q13: Which one is not an optical isomer?

A. Lactic acid B. 2-butanol C. Ethane D. Glyceraldehyde

Q14: Isomers of C₅H₁₂ include:

A. n-pentane, isopentane, neopentane B. Ethanol, Propanol, Butanol C. Methane, Ethane, Propane D. Pentanoic acid, Butanoic acid

Q15: Number of isomers for C₄H₁₀O is:

A. 5 B. 6 C. 7 D. 8

Q16: Which shows optical activity?

A. CH3CH2CH(OH)CH3 B. CH3CH2CH2OH C. CH3CHO D. CH3CH3

Q17: Isomers with different position of same functional group are:

A. Position isomers B. Functional isomers C. Chain isomers D. Tautomers

Q18: The pair CH3COCH3 and CH3CH2CHO is:

A. Chain isomers B. Tautomers C. Functional isomers D. Metamers

Q19: Geometrical isomerism is not possible in:

A. But-1-ene B. But-2-ene C. Pent-2-ene D. 3-hexene

Q20: How many chain isomers are possible for C5H12?

A. 2 B. 3 C. 4 D. 5

Quiz for Isomerism