Question

Which of the following statements is (are) true about the IR spectrum of the compound drawn belowa. It shows absorptions at 3000-3150 cm-1 and 1720 cm-1.b. It shows absorptions at 3000-2850 cm-1 and 2150 cm-1.c. It shows absorptions at 2150 cm-1 and 1650 cm-1.d. It shows absorptions at 2150 cm-1 and 1720 cm-1.e. Both statements (It shows absorptions at 3000-2850 cm-1 and 2150 cm-1) and (It shows absorptions at 2150 cm-1 and 1720 cm-1) are true.

Answer 1

Answer: (e).  Both statements (It shows absorptions at 3000-2850 cm-1 and 2150 cm-1) and (It shows absorptions at 2150 cm-1 and 1720 cm-1) are true.

Explanation:

 from the question, we are given the IR spectrum of the compound drawn and we need to find out if the statements is (are) true about the IR spectrum

In the given compound there is carbonyl, alkyl halide and cyanide, functional group are presents, so we are there are IR spectrum range between the

-2210-2260 for the cyanide

-1705-1725 cm-1 for th carbonyl group

-500-600 cm-1 for the C-Br stretching.

There are IR spectrum between 2850-3000 cm-1

So there is - Both statements (It shows absorptions at 3000-2850 cm-1 and 2150 cm-1) and (It shows absorptions at 2150 cm-1 and 1720 cm-1) are true.

i hope this helps, cheers.