Test Yourself : Chapter 64 Instrumental analytical methods

Test Yourself : Chapter 64 Instrumental analytical methods

9th - 12th Grade

8 Qs

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Test Yourself : Chapter 64 Instrumental analytical methods

Test Yourself : Chapter 64 Instrumental analytical methods

Assessment

Quiz

Chemistry

9th - 12th Grade

Hard

Created by

Chemistry Aristo

FREE Resource

8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following colour filters is suitable for use in colorimetric measurement of a sample sodium chromate solution?
A. Purple filter
B. Red filter
C. Green filter
D. Orange filter

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following statements concerning colorimetry are correct?

(1) A colorimeter is used to carry out colorimetry.

(2) It determines the concentration of a coloured species by measuring the amount of light its sample solution transmits.

(3) The lower the concentration of a solution of the coloured species, the lower is its absorbance.

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which of the following characteristic infrared radiation wavenumber ranges can be used to distinguish between propan-1-ol and propanoic acid?

(1) The wavenumber range 1680–1800 cm⁻¹

(2) The wavenumber range 2500–3300 cm⁻¹

(3) The wavenumber range 3230–3670 cm⁻¹

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The infrared spectrum of compound W is shown in the diagram. Which of the following bonds is most likely to be present in W?

A. C≡C
B. C≡N
C. C=O
D. N–H

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

P is an acyclic compound (with a molecular formula C₃H₈O). Upon heating with excess acidified potassium dichromate solution under reflux, P can be converted to compound Q. The infrared spectrum of Q is shown in the diagram. What is the condensed structural formula of P?

A. CH₃CHCH₂O
B. CH₃OCH₂CH₃
C. CH₃CH₂CH₂OH
D. CH₃CH(OH)CH₃

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following ions would be deflected to the least extent in a mass spectrometer?

A. C₆H₅³⁷Cl²⁺

B. C₆H₅³⁵Cl²⁺

C. ⁺CH₂⁸¹Br

D. ⁺CH₂⁷⁹Br

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following compounds can produce a peak at m/z = 57 in their mass spectra?

(1) CH₃CH₂CH₂CH₂CH₃

(2) CH₃COCH₂CH₂CH₃

(3) CH₃CH₂COCH₂CH₂CH₃

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)

8.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

X is a carbon compound with a carbonyl group and not more than four carbon atoms. Its mass spectrum is shown in the diagram. Which of the following statements concerning X are correct?

(1) The relative molecular mass of X is 58.

(2) The peak at m/z = 43 is due to the fragment ion CH₃CO⁺.

(3) X is an aldehyde.

A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)