IGCSE Chemistry: Specimen Questions with Answers 160 - 163 of 240

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Question 160

Question

MCQ▾

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

Choices

Choice (4)

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 161

Edit

Statement

True-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 162

Question

MCQ▾

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

Choices

Choice (4)

a.

Paul Lauterbur

b.

Friedrich Wohler

c.

Irving Langmuir

d.

John Dalton

Answer

b.

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 .

Question 163

Edit

Write in Short

Short Answer▾

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.

Germanium forms a series of saturated hydrides similar to the alkanes.

Predict the general formula of the germanium hydrides.

Explanation

The general formula of the germanium hydrides is

Images of Germanium Hydrides

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