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MCQ on IR spectroscopy: Page-8

1. Which of the following vibrational mode of CO 2 is IR active

(A) Symmetric stretching

(B) Asymmetric stretching

(C) Both A and B

(D) None

4. All of the following are the components of FTIR, except

(A) Fixer mirror

(B) Grating

(C) Moving mirror

(D) Beam splitter

Symmetrical stretching is not observed in

(A) CO 2

(B) H 2O

(C) ROH

(D) ROR

4. All of the following are the degrees of freedom for a molecule at any instance, EXCEPT

(A) Electronic

(B) Vibrational

(C) Rotational

(D) Translational

5. How many vibrational modes are possible for acetylene

(A) 2

(B) 6

(C) 7

(D) 8