9th Class Chemistry, Chapter 1 - Compound & Mixture

9^th Chemistry

Chapter 1:-

Fundamentals Of Chemistry

1.1            Topic 4:-

Compound & Mixture

MCQ’s.

1. Which of the following can be separated by physical means?

(Grw_ 18-GII)

(A)  mixture

(B)   compound

(C)   radical

(D)  element

Ans:- (A) mixture

 

Short Q’s.

1. Write down chemical formula of calcium phosphate and sodium chloride.

(Grw_ 19-GI)

Ans:- Calcium Phosphate Ca₃(PO₄)₂. Sodium Chloride (Common Salt) NaCl.

2. Write down chemical formula of the following;

(a)   Sugar          (b) Sulphuric Acid

(Grw_ 19-GII)

Ans:- Sugar C₁₂H₂₂O₁₁. Sulphuric Acid H₂SO₄.

3. Differentiate between homogeneous and heterogeneous mixtures.

(Grw_ 18-GI, 18-GII)

Ans:- Mixtures that have uniform composition throughout are called homogeneous mixtures e.g. air, gasoline, ice cream. Whereas, heterogeneous mixtures are those in which composition is not uniform throughout e.g. soil, rock and wood.

 

Long Q’s.

1. List five characteristics by which compounds can be distinguished from mixtures.

(Grw_ 17-GI)

 

Follow Us; 

Website:-    https://aplusacademy98.blogspot.com 

YouTube:-  https://www.youtube.com/channel/UCp_b9zbNZLLq1ItdohC6SSA 

Facebook:- https://web.facebook.com/A-Academy-361034727938720 

Twitter:-     https://twitter.com/AshirAz14913287 

LinkedIn:-  https://www.linkedin.com/in/a-plus-academy-63470a1b4

Pinterest:-  https://www.pinterest.com/ashirazeem30aa/boards

Reddit:-     https://www.reddit.com/user/APlusAcademy

Written By:- M.Ashir Azeem

9th Class Chemistry, Chapter 1 - Elements

9^th Chemistry

Chapter 1:-

Fundamentals Of Chemistry

1.1            Topic 3:-

Elements

Short Q’s.

1. Human body is made up of how many elements? Write their names.

(Grw_ 19-GII)

Ans:- Six elements constitute about 99% of our body mass; namely: Oxygen 65 %, Carbon 18%, Hydrogen 10 %, Nitrogen 3%, Calcium 1.5% and Phosphorus 1.5%.

 

Follow Us; 

Website:-    https://aplusacademy98.blogspot.com 

YouTube:-  https://www.youtube.com/channel/UCp_b9zbNZLLq1ItdohC6SSA 

Facebook:- https://web.facebook.com/A-Academy-361034727938720 

Twitter:-     https://twitter.com/AshirAz14913287 

LinkedIn:-  https://www.linkedin.com/in/a-plus-academy-63470a1b4

Pinterest:-  https://www.pinterest.com/ashirazeem30aa/boards

Reddit:-     https://www.reddit.com/user/APlusAcademy

Written By:- M.Ashir Azeem

9th Class Chemistry, Chapter 1 - Branches Of Chemistry

9^th Chemistry

Chapter 1:-

Fundamentals Of Chemistry

1.1            Topic 1:-

Branches Of Chemistry:-

Short Q’s.

1. Define Nuclear Chemistry.

(Grw_ 19-GI, 19-GII)

Ans:- Nuclear Chemistry is the branch of chemistry that deals with the radioactivity, nuclear processes and properties.

 

Follow Us; 

Website:-    https://aplusacademy98.blogspot.com 

YouTube:-  https://www.youtube.com/channel/UCp_b9zbNZLLq1ItdohC6SSA 

Facebook:- https://web.facebook.com/A-Academy-361034727938720 

Twitter:-     https://twitter.com/AshirAz14913287 

LinkedIn:-  https://www.linkedin.com/in/a-plus-academy-63470a1b4

Pinterest:-  https://www.pinterest.com/ashirazeem30aa/boards

Reddit:-     https://www.reddit.com/user/APlusAcademy

Written By:- M.Ashir Azeem