Chapter 2

Chapter 2

University

6 Qs

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Chapter 2

Chapter 2

Assessment

Quiz

Chemistry

University

Practice Problem

Hard

Created by

WONG Moe

Used 1+ times

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following electron transitions occurs in the ultraviolet range of the electromagnetic spectrum?

n=3 to n=1

n=3 to n=2

n=4 to n=3

n=2 to n=3

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following electron transitions in the hydrogen atom has the highest frequency?

n=3 to n=1

n=4 to n=2

n=5 to n=3

n=7 to n=2

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many lines can be formed in the ultraviolet range for all the transitions involving the first seven energy levels in the emission spectrum for the hydrogen atom?

6

7

8

9

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The emission spectrum of hydrogen atom is a line spectrum because

energy is required to excite an electron

electrons which are unstable will radiate energy

an excited electron has a higher energy and is not stable

the energy of an electron in a hydrogen atom is quantised

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An excited electron residing in the energy level n=4 drops to n=1. What is the wavelength of the emission if the frequency is 3.09 x 1015 Hz?
[c = 3.00 x 108 ms-1]

4.69 x 10-6 m

2.91 x 10-7 m

3.88 x 10-7 m

9.71 x 10-8 m

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following can be obtained from the Lyman series in the hydrogen atom spectrum?

The ionisation energy of hydrogen

The relative atomic mass of hydrogen

The bond energy of hydrogen

The vaporisation enthalpy of hydrogen

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