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Quiz about Organic and Inorganic Chemistry

Organic and Inorganic Chemistry Quiz

This quiz covers both organic and inorganic chemistry. Have fun!

A multiple-choice quiz by Garhobbs. Estimated time: 6 mins.

Author
Garhobbs

Time
6 mins

Type
Multiple Choice

Quiz #
60,803

Updated
Dec 03 21

# Qns
10

Difficulty
Difficult

Avg Score
4 / 10

Plays
2425

One at a Time - Single Page - Timed Game

Question 1 of 10

1. Which compound, when added to aqueous iron(II) sulphate, takes part in a redox reaction? Hint

potassium manganate(VII)

barium chloride

ammonia

sodium hydroxide

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Question 2 of 10

2. Copper(II) oxide speeds up the decomposition of aqueous hydrogen peroxide under room conditions. What would be seen in a test tube once the decomposition of aqueous hydrogen peroxide using copper(II) oxide is complete? Hint

a black solid and a blue solution

a reddish-brown solid and a colorless solution

a black solid and a colorless solution

a light blue solid and a colorless solution

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Question 3 of 10

3. Copper(II) chloride cannot be prepared by reacting dilute hydrochloric acid with Hint

copper

copper(II) carbonate

copper(II) oxide

copper(II) hydroxide

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Question 4 of 10

4. What is the same for both ethene and poly(ethene)? Hint

reactivity with bromine solution

relative molecular mass

empirical formula

melting point

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Question 5 of 10

5. Although aluminum is a reactive metal, it does not corrode easily. Why is this so? Hint

it takes a lot of energy to form its ionic compound, thus corrosion is minimal

it is protected by a layer of aluminum oxide

it is electrostatically charged to resist reaction with the surrounding

it has amphoteric properties, thus corrosion is minimal

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Question 6 of 10

6. Which of the following mixtures is best separated by the use of a separating funnel? Hint

ethanol and water

methane and water

ethanoic acid and water

ethyl ethanoate and water

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Question 7 of 10

7. Rubidium is an element in group I of the Periodic Table. Which statement about rubidium is likely to be correct? Hint

it forms an alkali with water

it forms a carbonate that is readily decomposed by heat

it is produced during electrolysis of aqueous rubidium chloride

it is a weak reducing agent

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Question 8 of 10

8. When aqueous ammonium chloride was heated with aqueous Y, a pungent gas which turned moist red litmus paper blue evolved. Which ion must have been present in Y? Hint

ammonium ion

chloride ion

hydroxide ion

sodium ion

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Question 9 of 10

9. Which of the following compounds share the same type of linkage? Hint

terylene and fats

nylon and starch

terylene and protein

nylon and fats

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Question 10 of 10

10. Which of the following is an endothermic reaction? Hint

dissolving sodium hydroxide in water

dissolving sodium chloride in water

Haber process

neutralization

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Dec 20 2024 : workisboring: 9/10
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Quiz Answer Key and Fun Facts

1. Which compound, when added to aqueous iron(II) sulphate, takes part in a redox reaction?

Answer: potassium manganate(VII)

Aqeuous iron(II) salts act as a reducing agent, while potassium mangante(VII) is an oxidising agent. The end product of the reaction gives a colorless or pale yellow solution.

Answer: a black solid and a colorless solution

Copper(II) oxide is a catalyst. It remains chemically unchanged at the end of the reaction. Hydrogen peroxide decomposes to become water and oxygen. Since copper(II) oxide is insoluble, a black solid and a colorless solution is formed at the end of the reaction.

3. Copper(II) chloride cannot be prepared by reacting dilute hydrochloric acid with

Answer: copper

Copper is too unreactive to have any reaction with dilute hydrochloric acid.

4. What is the same for both ethene and poly(ethene)?

Answer: empirical formula

The percentage composition of carbon and hydrogen is the same for both ethene and poly(ethene), there is no elimination or addition of any element or compound when forming poly(ethene) from ethene. Thus, empirical formula is the same.

5. Although aluminum is a reactive metal, it does not corrode easily. Why is this so?

Answer: it is protected by a layer of aluminum oxide

Aluminum reacts with oxygen in the air to form a non-porous layer of aluminum oxide that adheres to the metallic surface. This layer is very unreactive and protects the metal from corrosion.

6. Which of the following mixtures is best separated by the use of a separating funnel?

Answer: ethyl ethanoate and water

Ethyl ethanoate is immiscible with water, thus it is best separated using a separating funnel.

7. Rubidium is an element in group I of the Periodic Table. Which statement about rubidium is likely to be correct?

Answer: it forms an alkali with water

Group I metals, known as alkali metals, are the most reactive metals. They form very stable compounds and are not discharged in aqueous state. They can be obtained by electrolysis of its molten compound. They also react vigorously with water to form alkali.

8. When aqueous ammonium chloride was heated with aqueous Y, a pungent gas which turned moist red litmus paper blue evolved. Which ion must have been present in Y?

Answer: hydroxide ion

The gas is ammonia, thus aqueous Y must be an alkali, which therefore must contain the hydroxide ion. Ammonia is highly soluble in solution, thus must be heated to expel it from the solution.

9. Which of the following compounds share the same type of linkage?

Answer: terylene and fats

Terylene and fats share the ester linkage, nylon and proteins share the amide linkage.

10. Which of the following is an endothermic reaction?

Answer: dissolving sodium chloride in water

The energy needed to separate the sodium and chloride ions in the crystal lattice is greater than the energy evolved when the ions form hydrated ions. Heat of solution: +5.4 kJ per mol

Source: Author Garhobbs

This quiz was reviewed by FunTrivia editor gtho4 before going online.
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