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High level inorganic compounds quiz

This quiz is designed for those having some good knowledge of inorganic chemistry.

A multiple-choice quiz by and762. Estimated time: 5 mins.

Author
and762

Time
5 mins

Type
Multiple Choice

Quiz #
110,669

Updated
Dec 03 21

# Qns
10

Difficulty
Difficult

Avg Score
5 / 10

Plays
912

One at a Time - Single Page - Timed Game

Question 1 of 10

1. Molecular fluorine reacts with water. What are the resulting gaseous compounds?
1. oxygen 2. HF 3. HOF 4. (HF)2 Hint

1 + 3

1 + 2

2 + 3

1 + 2 + 4

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Question 2 of 10

2. Caro's acid contains sulphur, oxygen and hydrogen. What is its chemical formula?

Answer: (peroxosulphuric acid)

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Question 3 of 10

3. At very low temperature (close to 0 K), liquid helium almost reaches 0 viscosity.

True

False

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Question 4 of 10

4. There are some molybdenum compounds that contain quadruple chemical bonds.

True

False

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Question 5 of 10

5. Wet air is heavier than dry air.

True

False

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Question 6 of 10

6. Naphthalene can accept one electron to form an anion.

True

False

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Question 7 of 10

7. Which of the following compounds does NOT exist? Hint

ICl7

BrF3

IF7

ClF3

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Question 8 of 10

8. Silver can react with concentrated HCl+HBr solution, but it can not react with concentrated NaCN+NaOH solution.

True

False

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Question 9 of 10

9. Which of the following is an ionic compound ? Hint

XeF2

RnCl2

XeOF4

H6XeO6

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Question 10 of 10

10. Carbon dioxide is more soluble in a solution containing 3% chlorine, than in a solution containing 3 % iodine.

True

False

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Quiz Answer Key and Fun Facts

1. Molecular fluorine reacts with water. What are the resulting gaseous compounds? 1. oxygen 2. HF 3. HOF 4. (HF)2

Answer: 1 + 2

Fluorine reacts with water much different than the other halogens, 2*F2 + 2*H2O = 4*HF + O2 .

2. Caro's acid contains sulphur, oxygen and hydrogen. What is its chemical formula?

Answer: H2SO5

This acid is called peroxomonosulphuric acid, for it contains a peroxidic bond. Structure is similar to that of sulfuric acid; one -OH group is substituted with an -O-OH group.

3. At very low temperature (close to 0 K), liquid helium almost reaches 0 viscosity.

Answer: True

This is an unique property of helium; at low temperature, helium transforms into a red liquid (called He II) with unusual conductivity and viscosity properties.

4. There are some molybdenum compounds that contain quadruple chemical bonds.

Answer: True

Some complex molybdenum compounds contain quadruple Mo-Mo bonds(e.g. Mo2Cl4(L-L)2 and Mo2Cl6(L-L)2, where L-L is a bidentate phosphine ligand).

5. Wet air is heavier than dry air.

Answer: False

The weight of a given volume of a gas mixture is given by the medium molecular weight of this mixture which can be calculated using the formuala : M = �ni*Mi where ni = the proportion of gas i in the mixture, and Mi is the molecular weight of gas i. Air's molecular weight (calculated using this formula) is 28.9 g/mol. If we add water vapors to such mixture, the molecular weight of the mixture will decrease (since the Molecular weight of water is smaller than air's). Thus, the wet air will be lighter.

6. Naphthalene can accept one electron to form an anion.

Answer: True

Naphthalene reacts with sodium (and other metals) to form ionic compounds. (e.g. Na(+)NAPHTA(-). where NAPHTA = naphthalene)

7. Which of the following compounds does NOT exist?

Answer: ICl7

ICl7 does not exist; the volume of the iodine atom is too small for it to be surrounded by 7 chlorine atoms.

8. Silver can react with concentrated HCl+HBr solution, but it can not react with concentrated NaCN+NaOH solution.

Answer: False

Silver reacts with NaCN in alkaline solutions, to form Na[Ag(CN)2]

9. Which of the following is an ionic compound ?

Answer: RnCl2

RnCl2 is an ionic compound. Electrolysis of RnCl2 will give gaseous Rn and chlorine.

10. Carbon dioxide is more soluble in a solution containing 3% chlorine, than in a solution containing 3 % iodine.

Answer: False

The chlorine solution is has a much lower pH value, than the iodine solution; thus, it is more acid. CO2 is much more soluble in alkaline and neutral solutions than in acid solutions.

Source: Author and762

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