G8 U2 L1

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رقم الموبايل

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المدينة

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إختر الإجابة الصحيحة

سؤال رقم - 1

Each of the following is a chemical change, except………….

fruit rotting.

burning a piece of bread in the oven.

explosion of an air-filled balloon.

Conversion of the milk into yogurt.

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سؤال رقم - 2

What happens when a piece of chocolate is exposed to sunlight for a short time?

A strong burning smell is emitted.

Its colour is changed.

Its taste is changed

It melts and its composition does not change.

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سؤال رقم - 3

All the following changes produce new substances, except ……….

frying the eggs.

ice melting.

fuel combustion.

iron rust.

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سؤال رقم - 4

Which of the following is correct about each of soap and oil?

They have the same chemical properties.

They have the same physical properties.

Soap is a reactant and oil is a product.

Soap is a product and oil is a reactant.

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سؤال رقم - 5

All the following are indications of chemical reactions, except ………

The change of the colour of the substance.

Emission of odour.

The change in the volume of the substance.

Emission of light and heat.

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سؤال رقم - 6

During burning sugar, all the following occur, except………

it turns gradually into a brown molten substance.

the smell of caramel appears.

a precipitate is formed.

smoke evolves.

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سؤال رقم - 7

Soap is formed from the reaction of…………

oil with sodium hydroxide solution.

oil with sodium chloride solution.

oil with solid sodium hydroxide.

oil with solid sodium chloride.

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سؤال رقم - 8

The colour change occurs in each of the following cases, except………

iron rusting.

exposure of copper sulphate solution to sunlight.

frying eggs.

exposure of silver chloride precipitate to sunlight.

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سؤال رقم - 9

Physical changes do not change the chemical composition of the substance.

True

False

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سؤال رقم - 10

The melting of the wax results in a new substance.

True

False

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G8 U2 L1

إختر الإجابة الصحيحة

Each of the following is a chemical change, except………….

What happens when a piece of chocolate is exposed to sunlight for a short time?

All the following changes produce new substances, except ……….

Which of the following is correct about each of soap and oil?

All the following are indications of chemical reactions, except ………

During burning sugar, all the following occur, except………

Soap is formed from the reaction of…………

The colour change occurs in each of the following cases, except………

Physical changes do not change the chemical composition of the substance.

The melting of the wax results in a new substance.

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