CIE Chemistry (US-0439): Specimen Questions with Answers 231 - 234 of 240

Question number: 231

Short Answer Question▾

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The table shows some physical properties of the Group VII elements.

some physical properties of the Group VII elements

Some Physical Properties of the Group VII Elements

some physical properties of the Group VII elements

Suggest a value for the atomic radius of fluorine.

………………………………………………………………………………………………………….

Explanation

Atomic radius of fluorine is because it has electronegativity about .

Question number: 232

Short Answer Question▾

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Substances can be classified as:

Elements can be divided into:

Classify each of the following as either an element, compound or mixture.

brass. [1 Marks]

Explanation

Brass is a mixture of the elements of copper and zinc. Bronze is a mixture of copper and tin. Water is a compound of the elements hydrogen and oxygen.

Question number: 233

Short Answer Question▾

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Germanium is an element in Group IV. The electron distribution of a germanium atom is 2 + 8 + 18 + 4. It has oxidation states of + 2 and + 4.

Is the change to reduction, oxidation or neither? Give a reason for your choice.

Explanation

Change from to is oxidation number of it is .

Question number: 234

MCQ▾

Question

Mustard Oil is an example of a/an ________.

Choices

Choice (4) Response

a.

Acid

b.

Base

c.

Salt

d.

Question does not provide sufficient data or is vague

Answer

b.

Explanation

Mustard Oil is an example of a base. It doesn’t taste sour. So, it is not an acid.