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Chlorine Trivia Quiz

The element chlorine.

A multiple-choice quiz by tonythedad. Estimated time: 3 mins.

Author
tonythedad

Time
3 mins

Type
Multiple Choice

Quiz #
223,501

Updated
Dec 03 21

# Qns
10

Difficulty
Average

Avg Score
7 / 10

Plays
1622

One at a Time - Single Page - Timed Game

Question 1 of 10

1. The name 'chlorine' comes from the Greek word khl�ros meaning: Hint

green

poisonous

yellow

odorous

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Question 2 of 10

2. Chlorine falls in the halogen group in the periodic table. Halogen means: Hint

reactive

heavenly

salt-forming

hidden

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Question 3 of 10

3. Chlorine is added to most public water supplies in order to minimize tooth decay.

True

False

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Question 4 of 10

4. Some tree frogs use a poisonous chlorine compound in their skin.

True

False

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Question 5 of 10

5. Carl Wilhelm Scheele, the 18th century scientist, discovered chlorine, but thought it was a compound containing this element: Hint

Hydrogen

Oxygen

Fluorine

Helium

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Question 6 of 10

6. Chlorine gas escaping to the upper levels of the Earth's atmosphere destroys this important substance there. Hint

ozone

nitrous oxide

carbon dioxide

water

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Question 7 of 10

7. Chlorine was used as a chemical warfare weapon.

True

False

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Question 8 of 10

8. Chlorine is found in pure form at altitudes above 5000 ft. above sea level.

True

False

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Question 9 of 10

9. Carbon tetrachloride (CCl4) was NOT used in which of these? Hint

fire extinguishers

insect collecting

refrigeration

contact lens cleaning solutions

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Question 10 of 10

10. Industrial levels of chlorine are produced mainly by this method: Hint

diffusion

evaporation

electrolysis

freeze-drying

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Quiz Answer Key and Fun Facts

1. The name 'chlorine' comes from the Greek word khl�ros meaning:

Answer: green

It is a greenish-yellow gas, combining directly with nearly all elements.

2. Chlorine falls in the halogen group in the periodic table. Halogen means:

Answer: salt-forming

In nature it is found in the combined state only, chiefly with sodium as common salt (NaCl), carnallite, and sylvite.

3. Chlorine is added to most public water supplies in order to minimize tooth decay.

Answer: False

Chlorine is added to most public water supplies, but in order to kill any microbes. Fluorine, another halogen, is added to water in order to minimize tooth decay.

4. Some tree frogs use a poisonous chlorine compound in their skin.

Answer: True

Tree frogs have a chlorine compound in their skin that is a very powerful pain killer, 200 times more potent than any known pain killer. When used in small doses, this compound has no side effects; in large doses, it is fatal.

5. Carl Wilhelm Scheele, the 18th century scientist, discovered chlorine, but thought it was a compound containing this element:

Answer: Oxygen

Discovered in 1774 by Scheele, who thought it contained oxygen. Chlorine was named in 1810 by Humphry Davy, who insisted it was an element.

6. Chlorine gas escaping to the upper levels of the Earth's atmosphere destroys this important substance there.

Answer: ozone

Ozone (O3) naturally protects the Earth from excess ultraviolet radiation. Chlorine breaks up the ozone to let the radiation through, causing skin damage and cancer in humans and other animals.

7. Chlorine was used as a chemical warfare weapon.

Answer: True

It was used as a war gas in World War I.

8. Chlorine is found in pure form at altitudes above 5000 ft. above sea level.

Answer: False

In nature it is found in the combined state only, chiefly with sodium as common salt (NaCl), carnallite, and sylvite.

9. Carbon tetrachloride (CCl4) was NOT used in which of these?

Answer: contact lens cleaning solutions

Carbon tetrachloride (CCl4) is a synthetic chemical compound formerly widely used in fire extinguishers and refrigeration, but now largely abandoned due to its toxicity. It was also used in "kill jars" for insect collecting, utilizing its toxicity. It was also used for dry cleaning.

10. Industrial levels of chlorine are produced mainly by this method:

Answer: electrolysis

The three types of electrolysis used are mercury cell electrolysis, diaphragm cell electrolysis, and membrane cell electrolysis.

Source: Author tonythedad

This quiz was reviewed by FunTrivia editor crisw before going online.
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