Sec 4 Chemistry SIA

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Chemistry Space Adventure

- Welcome - Click HereTo Begin

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Welcome to Chemistry Warrior.We are so grateful that you

have agreed to help us.

As you have heard, aliens are threateningto mutate and steal atoms of

Earth’s periodic table.

Help us by answering questions , and following directions we send to your screen.

Thank you, and good luck :D

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Level One - Instructions

Click on the atoms to save them.

You must save all the atoms before clicking on the Level Complete button below.

There is a time limit, so hurry up!

Click THIS BOX to begin.

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The fate of our planetrests on your shoulders.

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Excellent Work!

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Time to test your knowledge!

Click Letter AboveTo Answer Question

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First Question!

Liquid petroleum gas (LPG) is predominantly made up of two alkanes. Which one of the following is one of the alkanes in LPG?

A. Methane B. PropaneC. OctaneD. Decane

A B C D


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Next Question…

What is the function of liquid petroleum gas in heaters?

A. It is a catalyst to allow for the faster release of heat.B. It is a cooling agent, allowing for the faster absorption of heat.C. It is a fuel for the combustion process to produce heat.D. It is an indicator of the temperature of the surrounding air.

A B C D


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Keep going!

Liquefied petroleum gas can be used to power absorption refrigerators or coolers. What is the coolant with a low boiling point usually used in absorption refrigerators?

A. NitrogenB. HydrogenC. AmmoniaD. Bromine

A B C D


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Another easy question for you

At what temperature would petroleum gas be distilled over?

A. <30°CB. 30 - 75°CC. 70 – 170 °CD. 200 – 250 °C

A B C D


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Almost there…

Which one of the following fuels is the most environmentally-friendly?

A. PetrolB. DieselC. KeroseneD. Liquid Petroleum Gas

A B C D

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Level Two - Instructions

Click on the atoms to save them.

You must save all the atoms before clicking on the Level Complete button below.

There is a time limit, so hurry up!

Click THIS BOX to begin.

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Question time!

Most rural areas have under-developed urban infrastructure. Why are absorption refrigerators so invaluable in rural areas?

A. Absorption refrigerators take up a lot of space.B. The use of absorption refrigerators contribute to global warming.C. Absorption refrigerators do not run on electricity.D. Absorption refrigerators are cooler than compressor refrigerators.

A B C D


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Press on to save the Earth!

What is the most important factor below that affects the production of soot, carbon monoxide, and other products of the incomplete combustion of fuels?

A. The ratio of carbon atoms to hydrogen atoms present in the fuelsB. The boiling point of the fuelsC. The energy content of the fuelsD. The density of the fuels

A B C D


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Think carefully

Absorption refrigerators work by keeping the coolant in a constant cycle by heating it where necessary. Which of the following is not a part of the coolant?

A. AmmoniaB. Hydrogen gasC. Water D. Iodine

A B C D


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Is this statement true?

The refining of petroleum is done in big refineries. The crude oil would first be washed with an acidic or basic solution, in order to be neutralized.

FalseTrue


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FalseTrue

Is this statement true too?

Apart from being found in natural petroleum, petroleum gas is rare as it cannot be produced from cracking.

Level Complete


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Level Three- Instructions

Click the atoms to save them from the dangers of outer space.

Watch out for asteroids! Touch them and you have to start over.

Remember that there is a time limit, so hurry up!

Click this box to begin.

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get the job done.


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Knowing is not enough, understanding is vital too.

Why is petroleum gas recognized as a more environmentally-friendly fuel?

A. It is cheap as compared to petrol.B. It leaves less soot behind as compared to other hydrocarbon fuels.C. It is rather abundant and can be easily obtained from natural petroleum.D. It is a fuel in gaseous form.

A B C D


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Recall, recall.

What is the last stage of the cooling process used in the absorption refrigerator?

A. Liquid ammonia will be sent through hydrogen gas.B. Gaseous ammonia goes through a chamber that makes it liquid again.C. Ammonia solution is separated from the water.D. Gaseous ammonia is directed into a section containing water to be dissolved in.

A B C D


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Balance is important…

Which one of these equations of the complete combustion of butane is correct?

A. 2C4H10 (g) + 9O2(g) -> 8CO (g) + 10H2OB. 2C4H10 (g) + 5O2(g) -> 8C (s) + 10H2OC. 2C4H10 + 13O2 -> 6CO2 + 10H2O D. 2C4H10 + 13O2 -> 8CO2 + 10H2O

A B C D


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Think beyond pure memorization

Transportation of petroleum gas was a problem because:

A. As a gas, it is hard to be contained, and hence, distributed for use easily.B. It is easily flammable, and so poses a safety risk.C. Leaks are hard to detect as petroleum gas is odourless by itself, and thus, leaked petroleum gas would be wasted.D. All of the above.

A B C D


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Last question!

The composition of hydrocarbons in petroleum gas for commercial use is normally a mixture of propane and butane. Why is this so?

1. More energy can be produced with comparison to solely propane.2. There would be a strong odour produced from mixing propane and butane, aiding the detection of gas leaks, which can be dangerous.3. The pollution caused by the burning of the petroleum gas can cause by burning only butane is reduced. A. 1 only.B. 1 and 2 only.C. 1 and 3 only.D. 1, 2, and 3.

A B C D

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Thank You!The atoms are now safe

from alien influence.

Our Planet hasbeen saved.

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Sec 4 Chemistry SIA