CBSE Class 7 Science Acid Bases And Salts Worksheet Set D

Read and download free pdf of CBSE Class 7 Science Acid Bases And Salts Worksheet Set D. Download printable Science Class 7 Worksheets in pdf format, CBSE Class 7 Science Chapter 5 Acids, Bases and Salts Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 7 Assignments and practice them daily to get better marks in tests and exams for Class 7. Free chapter wise worksheets with answers have been designed by Class 7 teachers as per latest examination pattern

Chapter 5 Acids, Bases and Salts Science Worksheet for Class 7

Class 7 Science students should refer to the following printable worksheet in Pdf in Class 7. This test paper with questions and solutions for Class 7 Science will be very useful for tests and exams and help you to score better marks

Class 7 Science Chapter 5 Acids, Bases and Salts Worksheet Pdf

TOPIC: ACIDS, BASES & SALTS

 
Important Revision Notes on Acids Bases and Salts
Acid :- Acid is a compound which when dissolves in water furnishes hydronium ion(H3O+) as the only positively charged ion.
Classification of the Acid :-
 
(A) Depending on their Source :-
(i) Organic Acid :- Acids which are obtained from plants and animals are called organic acid.
Eg:- Oxalic acid (COOH)2
Formic acid (HCOOH)
Acetic acid (CH3COOH)
The contain carbon atom along with hydrogen atom.
They are weak acid and they do not completely ionizes hence they contain ions as well as molecules
 
(ii) Inorganic/ Mineral Acid :- They are obtained from minerals. Eg:- Nitric Acid, Sulphuric Acid etc.
They are strong acid and they completely ionizes. Hence the solution obtained contains high concentration of hydronium ion.
These acid do not contain carbon except carbonic acid.
Carbonic Acid is a weak mineral acid which contain molecules.
Acid containing hydrogen and a non metallic element and do not contain oxygen are referred as hydra acid. Eg:- Hydrochloric acid ( HCL), Hydrobromic acid ( HBr)
Acid containing hydrogen and a non metallic element and contain oxygen are referred as oxy acid eg HNO3, H2SO4
 
(B) Depending on their basicity :- Basicity of an acid if defined as number of hydronium ions that can be produced by the ionisation of one molucules of that acid in aqueous solution
(i) Mono Basic Acid :- Acid which on ionisation in water produces one hydronium ion per molecule of the acid. Eg : HCL, HBr, HNO3, CH3COOH
(ii) Dibasic acid Eg:- Sulphuric acid (H2SO4) , Carbonic Acid ( H2CO3), Oxalic acid (H2C2O4),
NOTE :- H3PO3 is a Dibasic acid because of its structure .
(iii) Tribasic Acid :- Phosphoric Acid (H3PO4)
NOTE :- SILICIC ACID ( H4SiO4 ) has basicity 4
 
(C) Concentration of the Acid: The amount of water present in a given sample of the acid is called concentration. It is divided into two parts
(i) Concentrated Acid : A sample which contain little or no amount of water.
(ii) Dilute Acid : An acid which contain large amount of water
 
(D) Strength of the Acid: It is defined as the amount of hydronium ion (H3O+) generated in a given time interval. The acid which undergoes complete ionization in aqueous solution . Therefore producing high concentration of hydronium ion are called strong acid eg HCl, HNO3, H2SO4
The acid which undergoes partial ionization in aqueous solution are called weak acid . eg CH3COOH,
 
(E) Action on indicators

Ac

BASE : Those compounds which reacts with hydronium ion to form salt and water as the only product According to this definition metallic oxide/hydroxide (CuO,MgO,Cu(OH)2 ) comes into this category.
CuO + 2 HCl ——> CuCL2 + H2
But according to this definition PbO2 and MnO2 are not considered as base because both the compounds when reacted with HCl liberate chlorine gas along with salt and water.
PbO2 + 4HCl ——>PbCl2 + 2H2O + Cl2
MnO2 + 4HCl ——>MnCl2 + 2H2O + Cl2
 
Alkali : They are those bases which are soluble in water and produces hydroxyl ion ( OH-) as the only negatively charged ion.
NaOH ——>Na +1 + OH-1
NH4OH ——>NH4+1 + OH-1
According to this definition bases have to be soluble in water then only they would be reffered as alkali for eg Cu( OH)2 and Fe(OH)3 are bases but they are not alkali because they are insoluble in water . Hence all alkali are bases but all bases are not alkali.
 
Classification of Alkali
(A) On the basis of acidity: The number of hydroxyl ion (OH-) that can be produced per molecule of the base in aqueous solution
(i) Monoacidic base : NaOH, KOH, NH4OH
(ii) Diacidic base : Ca(OH)2
(iii) Triacidic base : Al(OH)3
 
(B) Action on indicators
Ac1
 
pH of solution : It is the negative logarithm to the base 10 of the hydronium ion concentration expressed in moles per litre
If pH = 7 then the solution is neutral
If pH < 7 then the solution is acidic
If pH > 7 then the solution is alkaline
Universal Indicatores : It give different colours to different concentrations of hydronium ion in solution
 
Salts : A compound formed by neutralization of an acid with a base is called a salt
(i) Normal salt : The complete replacement of hydrogen ions of an acid by a base .
(ii) Acidic salt : The partial/incomplete replacement of hydrogen ion of an acid by a base.
(iii) Basic salt: The partial/incomplete replacement of hydroxyl ion of a base by an acid.
 
 
 
Question : 1. Differentiate between organic acids and mineral acids. Give two examples each.
 
----------------------------------------------------------------------------------------------------------------------------
 
--------------------------------------------------------------------------------------------------------------------------------------------------
 
--------------------------------------------------------------------------------------------------------------------------------------------------
 

Question : 2. When turmeric stain gets on a white cloth & the cloth is cleaned with soap, the stain becomes red. Why? How can one remove the red stain?
 
----------------------------------------------------------------------------------------------------------
 
----------------------------------------------------------------------------------------------------------
 
 
Question : 3. a) How are salts formed?
 
---------------------------------------------------------------------------------------------------------
 
b) How do salts differ from acids and bases?
 
---------------------------------------------------------------------------------------------------------
 
c) Name two salts which are commonly used at home.
 
----------------------------------------------------------------------------------------------------------
 
----------------------------------------------------------------------------------------------------------
 
Question : 4. Write an example for the word equation for the neutralization reaction.
 
----------------------------------------------------------------------------------------------------------
 
 
Question : 5. What are alkalis?
 
---------------------------------------------------------------------------------------------------------
 
 
Question : 6. Why are antacids used in daily life?
 
-------------------------------------------------------------------------------------------------------------------------------------------------
 
 
Question : 7. You are provided with three test tubes. Tube A contains lemon juice, tube B contains soap solution and tube C contains pure water. What will you observe when you put a piece of
 
i. blue litmus paper in each of the test tube.
 
----------------------------------------------------------------------------------------------------------------------------------------------
 
ii. red litmus paper is put into each of the test tube.
 
-----------------------------------------------------------------------------------------------------------------------------------------------
 
iii. a few drops of china rose indicator into each of the test tubes.
 
---------------------------------------------------------------------------------------------------------
 

Question : 8. Is distilled water acidic /basic or neutral? How would you verify it?
 
---------------------------------------------------------------------------------------------------------
 
---------------------------------------------------------------------------------------------------------

Question : 9. Disposal of factory waste in water bodies has been found to be harmful to aquatic plants and animals. What should the factory owners do to prevent the above ill effect?
 
----------------------------------------------------------------------------------------------------------
 
----------------------------------------------------------------------------------------------------------
 

Question : 10. How does rain water become acidic?
 
-------------------------------------------------------------------------------------------------------------------------------------------------
 
-------------------------------------------------------------------------------------------------------------------------------------------------


Please click on below link to download CBSE Class 7 Science Acid Bases And Salts Worksheet Set D

Chapter 07 Weather, Climate and Adaptations of Animals to Climate
CBSE Class 7 Science Weather Climate and Adaptions of Animals to Climate Worksheet Set A
Chapter 16 Water: A Precious Resource
CBSE Class 7 Science Water A Precious Resource Worksheet
Revision Worksheets for Class 7 Science
CBSE Class 7 Science Revision Worksheet

CBSE Class 7 Science Chapter 5 Acids, Bases and Salts Worksheet

The above practice worksheet for Chapter 5 Acids, Bases and Salts has been designed as per the current syllabus for Class 7 Science released by CBSE. Students studying in Class 7 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 7 Science on a daily basis. All the latest practice worksheets with solutions have been developed for Science by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 7 Science students to get all the latest study material free of cost.

Worksheet for Science CBSE Class 7 Chapter 5 Acids, Bases and Salts

Teachers of studiestoday have referred to the NCERT book for Class 7 Science to develop the Science Class 7 worksheet. If you download the practice worksheet for the above chapter daily, you will get better scores in Class 7 exams this year as you will have stronger concepts. Daily questions practice of Science printable worksheet and its study material will help students to have a stronger understanding of all concepts and also make them experts on all scoring topics. You can easily download and save all revision Worksheets for Class 7 Science also from www.studiestoday.com without paying anything in Pdf format. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 7 Science designed by our teachers

Chapter 5 Acids, Bases and Salts worksheet Science CBSE Class 7

All practice paper sheet given above for Class 7 Science have been made as per the latest syllabus and books issued for the current academic year. The students of Class 7 can be assured that the answers have been also provided by our teachers for all test paper of Science so that you are able to solve the problems and then compare your answers with the solutions provided by us. We have also provided a lot of MCQ questions for Class 7 Science in the worksheet so that you can solve questions relating to all topics given in each chapter. All study material for Class 7 Science students have been given on studiestoday.

Chapter 5 Acids, Bases and Salts CBSE Class 7 Science Worksheet

Regular printable worksheet practice helps to gain more practice in solving questions to obtain a more comprehensive understanding of Chapter 5 Acids, Bases and Salts concepts. Practice worksheets play an important role in developing an understanding of Chapter 5 Acids, Bases and Salts in CBSE Class 7. Students can download and save or print all the printable worksheets, assignments, and practice sheets of the above chapter in Class 7 Science in Pdf format from studiestoday. You can print or read them online on your computer or mobile or any other device. After solving these you should also refer to Class 7 Science MCQ Test for the same chapter.

Worksheet for CBSE Science Class 7 Chapter 5 Acids, Bases and Salts

CBSE Class 7 Science best textbooks have been used for writing the problems given in the above worksheet. If you have tests coming up then you should revise all concepts relating to Chapter 5 Acids, Bases and Salts and then take out a print of the above practice sheet and attempt all problems. We have also provided a lot of other Worksheets for Class 7 Science which you can use to further make yourself better in Science

Where can I download latest CBSE Practice worksheets for Class 7 Science Chapter 5 Acids, Bases and Salts

You can download the CBSE Practice worksheets for Class 7 Science Chapter 5 Acids, Bases and Salts for the latest session from StudiesToday.com

Can I download the Practice worksheets of Class 7 Science Chapter 5 Acids, Bases and Salts in Pdf

Yes, you can click on the links above and download chapter-wise Practice worksheets in PDFs for Class 7 for Science Chapter 5 Acids, Bases and Salts

Are the Class 7 Science Chapter 5 Acids, Bases and Salts Practice worksheets available for the latest session

Yes, the Practice worksheets issued for Chapter 5 Acids, Bases and Salts Class 7 Science have been made available here for the latest academic session

How can I download the Chapter 5 Acids, Bases and Salts Class 7 Science Practice worksheets

You can easily access the links above and download the Class 7 Practice worksheets Science for Chapter 5 Acids, Bases and Salts

Is there any charge for the Practice worksheets for Class 7 Science Chapter 5 Acids, Bases and Salts

There is no charge for the Practice worksheets for Class 7 CBSE Science Chapter 5 Acids, Bases and Salts you can download everything free

How can I improve my scores by solving questions given in Practice worksheets in Chapter 5 Acids, Bases and Salts Class 7 Science

Regular revision of practice worksheets given on studiestoday for Class 7 subject Science Chapter 5 Acids, Bases and Salts can help you to score better marks in exams

Are there any websites that offer free Practice test papers for Class 7 Science Chapter 5 Acids, Bases and Salts

Yes, studiestoday.com provides all the latest Class 7 Science Chapter 5 Acids, Bases and Salts test practice sheets with answers based on the latest books for the current academic session

Can test sheet papers for Chapter 5 Acids, Bases and Salts Class 7 Science be accessed on mobile devices

Yes, studiestoday provides worksheets in Pdf for Chapter 5 Acids, Bases and Salts Class 7 Science in mobile-friendly format and can be accessed on smartphones and tablets.

Are practice worksheets for Class 7 Science Chapter 5 Acids, Bases and Salts available in multiple languages

Yes, practice worksheets for Class 7 Science Chapter 5 Acids, Bases and Salts are available in multiple languages, including English, Hindi