Explore topic-wise MCQs in Organic Chemistry.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Organic Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

WHAT_IS_THE_ORDER_OF_DECREASING_VIBRATIONAL_FREQUENCY_FOR_C_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ√Ü_CL,_C_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ√Ü_BR,_C_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ√Ü_C,_C_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ√Ü_O_AND_C_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ√Ü_H??$#

A. C-H, C-C, C-O, C- Cl, C-Br
B. C- Cl, C-Br, C-C, C -H, C-O
C. C-O, C-H, C-Br, C- Cl, C-C
D. C-Br, C- Cl, C-C, C-O, C-H
Answer» B. C- Cl, C-Br, C-C, C -H, C-O
Discussion
2.

What_is_the_correct_increasing_order_of_stretching_frequencies_for_C_≡_C,_C_=_C_and_C_—_C?$#

A. C — C > C = C > C ≡ C
B. C ≡ C > C = C > C — C
C. C — C > C = C < C ≡ C
D. C ≡ C < C — C > C = C
Answer» C. C ‚Äö√Ñ√∂‚àö√ë‚àö√Ü C > C = C < C ‚Äö√Ñ√∂‚àö¬¢¬¨‚àû C
Discussion
3.

The frequency of vibration of a bond is a function of which factor?

A. Force constant of the bond
B. Masses of the atoms involved in bonding
C. Force constant of the bond and Masses of the atoms
D. Bond order
Answer» D. Bond order
Discussion
4.

The vibrations, without a center of symmetry are active in which of the following region?

A. Infrared but inactive in Raman
B. Raman but inactive in IR
C. Raman and IR
D. Inactive in both Raman and IR
Answer» D. Inactive in both Raman and IR
Discussion
5.

Since the nuclei in a polyatomic molecule do not always vibrate in a simple harmonic manner, there arises which of the following situation?

A. Harmonicity
B. Anharmonicity in molecular vibrations
C. Fundamental frequencies
D. Infrared
Answer» B. Anharmonicity in molecular vibrations
Discussion
6.

For HCI, = 1.63 x 10-27 kg, the observed frequency = 2890 or v = 8.67 x 1013 Hz. What is the force constant K?

A. 4.83 m dyn √Ö<sup>-1</sup>
B. 8.43 dynes cm<sup>-1</sup>
C. 483 μm<sup>-1</sup>
D. 4.83 dyn √Ö<sup>-1</sup>
Answer» B. 8.43 dynes cm<sup>-1</sup>
Discussion
7.

In which unit Force constant is not expressed?

A. Dynes cm<sup>-1</sup>
B. dyne √Ö<sup>-1</sup>
C. Nm<sup>-1</sup>
D. kp
Answer» E.
Discussion
8.

On which factors the vibrational stretching frequency of diatomic molecule depend?

A. Force constant
B. Atomic population
C. Temperature
D. Magnetic field
Answer» B. Atomic population
Discussion
9.

The intensity of an absorption band is always proportional to which of the following factor?

A. Atomic population
B. Molecular population of the initial state
C. Molecular population of the final state
D. Temperature
Answer» C. Molecular population of the final state
Discussion
10.

What is the relation between restoring force, f to the displacement q in Hooke’s law?

A. f = -kq
B. f = kq
C. f = kq<sup>2</sup>
D. f = -kq<sup>2</sup>
Answer» B. f = kq
Discussion