CIE Chemistry (US-0439): Specimen Questions with Answers 159 - 162 of 240

Question number: 159

MCQ▾

Question

Aliphatic compounds are those compounds which have:

Choices

Choice (4) Response

a.

Cyclic structure

b.

Open chain structure

c.

Cyclic and branched chain structure

d.

Closed chain structure

Answer

b.

Explanation

  • Compounds having open chain structure are known as aliphatic compounds. Open chain structures consist of straight chain structure and branched chain structure.

  • In a straight chain structure, carbon atoms are linked with each other in a straight chain by a strong covalent bond. E. g. Heptane. Its condensed formula is:

Image of the chain structure of heptane

Image of the Chain Structure of Heptane

Image of the chain structure of heptane

Image of the open chain structure of 2 methyl propane

Image of the Open Chain Structure of 2 Methyl Propane

Image of the open chain structure of 2 methyl propane

Question number: 160

MCQ▾

Question

Arrhenius said that all those substances that give ________ ions as the only negatively charged ions in a solution are bases.

Choices

Choice (4) Response

a.

b.

c.

d.

Answer

d.

Explanation

Arrhenius said that all those substances that give ions as the only negatively charged ions in a solution are bases.

Question number: 161

True-False▾

Is the Following Statement True or False?

Bleaching powder is made from hydrochloric acid.

Answer

TRUE

Explanation

Bleaching powder can be made using hydrochloric acid.

So, the statement is true.

Question number: 162

MCQ▾

Question

The scientist who is known as “The Lord of the Carbon Rings” is ________.

Choices

Choice (4) Response

a.

John Dalton

b.

Paul Lauterbur

c.

Friedrich Wohler

d.

Irving Langmuir

Answer

c.

Explanation

  • Friedrich Wohler is known as “The Lord of the Carbon Rings”. In the year , he was the first one to create an organic substance from inorganic chemicals.

  • He prepared urea accidentally in the laboratory. He prepared an unstable inorganic compound which got converted to a stable compound which was urea .