CIE Chemistry (US-0439): Specimen Questions with Answers 88 - 90 of 240

Question number: 88

MCQ▾

Question

________ is the branch of chemistry which deals with the compounds derived from non-living sources.

Choices

Choice (4) Response

a.

Inorganic chemistry

b.

Organic chemistry

c.

None of the above

d.

All of the above

Answer

a.

Explanation

  • Inorganic chemistry is the branch of chemistry which deals with the compounds derived from non-living sources. The main substituents of the inorganic substances are the inorganic elements such as sodium, potassium, nickel, hydrogen, oxygen etc. Inorganic compounds do not contain carbon.

  • For example, sodium sulphate sulphuric acid , etc. are inorganic compounds because they all are derived from non-living sources. These compounds are studied under the branch of chemistry known as inorganic chemistry.

Question number: 89

MCQ▾

Question

Number of valence electrons in group is ________.

Choices

Choice (4) Response

a.

1

b.

2

c.

3

d.

4

Answer

c.

Explanation

Correct option is C because number of valence electron is equal to the group number.

Question number: 90

Short Answer Question▾

Write in Short

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.