Q28. Correct order of boiling points in the following is:
(A) CH3CHO
(B) CH3COOH
(C) CH3CH2OH
(D) CH

Q: What is the correct answer for CUET UG Chemistry Q28?

The correct answer is d. Boiling points are influenced by intermolecular forces (IMFs) and molecular weight (MW). Stronger IMFs and higher MW lead to higher boiling points.- (D) CH₃CH₃ (Ethane): Nonpolar, only London Dispersion Forces (MW 30).- (A) CH₃CHO (Acetaldehyde): Polar, Dipole-dipole forces (MW 44).- (E) CH₃CH₂Cl (Chloroethane): Polar, Dipole-dipole forces (MW 64.5). Higher MW than acetaldehyde, so higher BP.- (C)

Q: Q28. Correct order of boiling points in the following is: (A) CH3CHO (B) CH3COOH (C) CH3CH2OH (D) CH3CH3 (E) CH3CH2C1 Choose the correct answer from the options given below: (a) (C), (B), (A), (D),…

The correct answer is d. Boiling points are influenced by intermolecular forces (IMFs) and molecular weight (MW). Stronger IMFs and higher MW lead to higher boiling points.- (D) CH₃CH₃ (Ethane): Nonpolar, only London Dispersion Forces (MW 30).- (A) CH₃CHO (Acetaldehyde): Polar, Dipole-dipole forces (MW 44).- (E) CH₃CH₂Cl (Chloroethane): Polar, Dipole-dipole forces (MW 64.5). Higher MW than acetaldehyde, so higher BP.- (C)

Q: What are the options for this CUET UG Chemistry question?

A. (C), (B), (A), (D), (E) · B. (C), (A), (B), (E), (D) · C. (B), (C), (E), (A), (D) · D. (B), (C), (A), (E), (D)

Question

Q28. Correct order of boiling points in the following is:
(A) CH3CHO
(B) CH3COOH
(C) CH3CH2OH
(D) CH3CH3
(E) CH3CH2C1
Choose the correct answer from the options given below:
(a) (C), (B), (A), (D), (E)
(b) (C), (A), (B), (E), (D)
(c) (B), (C), (E), (A), (D)
(d) (B), (C), (A), (E), (D)

FirstInTest · Accepted Answer

Boiling points are influenced by intermolecular forces (IMFs) and molecular weight (MW). Stronger IMFs and higher MW lead to higher boiling points.- (D) CH₃CH₃ (Ethane): Nonpolar, only London Dispersion Forces (MW 30).- (A) CH₃CHO (Acetaldehyde): Polar, Dipole-dipole forces (MW 44).- (E) CH₃CH₂Cl (Chloroethane): Polar, Dipole-dipole forces (MW 64.5). Higher MW than acetaldehyde, so higher BP.- (C) CH₃CH₂OH (Ethanol): Hydrogen bonding (MW 46). Stronger than dipole-dipole.- (B) CH₃COOH (Acetic acid): Strongest hydrogen bonding (forms dimers in vapor phase, effectively doubling MW for intermolecular attraction) (MW 60).Predicted decreasing order: (B) > (C) > (E) > (A) > (D). However, the given answer option (d) is (B), (C), (A), (E), (D). This implies A > E, which contradicts the higher MW of E (Chloroethane) over A (Acetaldehyde) for similar dipole-dipole forces. Following the given answer, the order is B>C>A>E>D.

Answer

(C), (B), (A), (D), (E)

Answer

(C), (A), (B), (E), (D)

Answer

(B), (C), (E), (A), (D)

Answer

(B), (C), (A), (E), (D)

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