IGCSE Chemistry: Specimen Questions with Answers 191 - 193 of 240

Doorsteptutor material for Bank-PO is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of Bank-PO.

Question 191

Question

MCQ▾

________ completely ionize to produce a high concentration of ions.

Choices

Choice (4)

a.

Weak acids

b.

Strong acids

c.

Strong bases

d.

Weak bases

Answer

b.

Explanation

Strong acids completely ionize to produce a high concentration of ions. E. g etc.

Question 192

Write in Short

Short Answer▾

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

Some Physical Properties of the Group VII Elements

Describe the color of chlorine.

Explanation

The halogens darken in colour as the group is descended: thus, while fluorine is a pale yellow gas, chlorine is distinctly yellow-green.

Question 193

Question

MCQ▾

Those hydrocarbons in which all the carbon atoms are single bonded to each other are known as ________.

Choices

Choice (4)

a.

Alkene

b.

Alkyne

c.

Alkane

d.

All of the above

Answer

c.

Explanation

Hydrocarbons are the compounds of carbon and hydrogen. Those hydrocarbons in which all the carbon atoms are singly bonded to each other are known as alkanes.

Some examples of alkanes are methane , ethane , propane etc.

The structure of propane is:

The Structure of Propane

It can be seen easily that all the carbon atoms present in propane are bonded to each other by single bonds.

Developed by: