CBSE Class 10 Chemistry Practical Worksheet Set A

Read and download free pdf of CBSE Class 10 Chemistry Practical Worksheet Set A. Download printable Science Class 10 Worksheets in pdf format, CBSE Class 10 Science Practical Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 10 Assignments and practice them daily to get better marks in tests and exams for Class 10. Free chapter wise worksheets with answers have been designed by Class 10 teachers as per latest examination pattern

Practical Science Worksheet for Class 10

Class 10 Science students should refer to the following printable worksheet in Pdf in Class 10. This test paper with questions and solutions for Class 10 Science will be very useful for tests and exams and help you to score better marks

Class 10 Science Practical Worksheet Pdf

 

To study Saponification recation for the preparation of Soap

Experiment No: 6 

Objective: To study Saponification reaction for the preparation of Soap.

Requirements: Sodium hydroxide, vegetable oil, ethanol, common salt, distilled water, beakers, measuring cylinder etc.

Theory : Soaps are sodium or potassium salts of carboxylic acids with long hydrocarbon chains. Soap can be made from the base hydrolysis of fat or oil. The process in which oil or fat reacts with NaOH to form soap(sodium salt of fatty acid) and glycerol is called saponification reaction.

CBSE Class 10 Chemistry Practical Worksheet Set A 1

Procedure :

· Take about 20 ml of vegetable oil in a beaker.

· Add 15 ml of ethanol &25 ml of 20 %NaOH to vegetable oil with stirring. Heat the mixture for 20 minutes until the solution no longer has 2 separate layers.(do not over heat the mixture to dryness).

· Remove the beaker from the burner,& add 20 ml of saturated NaCl solution.This process is called ‘salting out’ .

· Cool the mixture till it becomes solid

· Remove &cut it into desired shape &size.

Result

· Soap solution is basic in nature .

Precautions

· Do not touch solid NaOH

· Stir the soap soln care fully so that it does not spill out.

· The mixture of oil &ethanol may splatter or catch fire ,have a watch glass nearby to smother any flames.

Questions

• What is the by product of saponification reaction?

•  What is the chemical reaction involved in soap preparation?

•  Give a method to separate glycerol from the reaction mixture?

•  Distillation under reduced pressure

•  Why is it advised to add common salt while preparing soap? It helps in complete precipitation of soap.

Multiple choice questions

1. When you a 20% soln of NaOH in a beaker containing water, you record certain observations. Select the correct observations from the following:

a) NaOH is in the form of pellets/flakes.

b) It dissolves in water completely.

c) The beaker appears cold when touched from outside immediately after adding NaOH to water.

d) When litmus paper is dipped into the soln. It turns blue.

2. While preparing soap we generally add small amount of common salt to the reaction mixture of oil and NaOH. The purpose of adding common salt is

a) Make the soap neutral .

b) Reduce the basic nature of the soap.

c) Enhance the cleansing power of the soap.

d) Favour the precipitation of the soap.

3. A student dipped a red litmus paper in the soap soln. She observed that

a) It changed to blue.

b) It remained red.

c) It changed to green.

d) It changed to orange

4. Soaps have different foaming capacities due to

a) Different alkyl groups.

b) Different cations present

c) Same alkyl groups.

d) Same cation present in soap

5. Part of soap which is hydrophobic

a) Hydrocarbon

b) COONa

c) Both

d) None of these

6. Which is the by-product of saponification reaction?

a) Glycol

b) Glycerol

c) Ethanol

d) Methanol

7. Which process describes saponification ?

a) Acid hydrolysis

b) Esterification

c) Alkaline hydrolysis of ester

d) Alkali formation

8. A student is provided with four types of acids for the preparation of soaps. Which among the following is the most suitable one:

a) Acetic acid

b) Propanoic acid

c) Citric acid

d) Palmitic acid
 

Please click on below link to download CBSE Class 10 Chemistry Practical Worksheet Set A

Chapter 06 Life Processes
CBSE Class 10 Biology Excretion Set A
CBSE Class 10 Biology Excretion Set B
CBSE Class 10 Biology Excretion Set C
CBSE Class 10 Biology Heterotrophic Nutrition Worksheet Set A
CBSE Class 10 Biology Heterotrophic Nutrition Worksheet Set B
CBSE Class 10 Biology Life Processes Nutrition In Animals Worksheet
CBSE Class 10 Biology Life Processes Nutrition In Plants Worksheet
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set A
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set B
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set C
CBSE Class 10 Biology Life Processes Nutrition Worksheet Set D
CBSE Class 10 Biology Life Processes Reference Materials Worksheet
CBSE Class 10 Biology Life Processes Respiration In Animals Worksheet
CBSE Class 10 Biology Life Processes Respiration Worksheet Set A
CBSE Class 10 Biology Life Processes Respiration Worksheet Set B
CBSE Class 10 Biology Life Processes Respiration Worksheet Set C
CBSE Class 10 Biology Life Processes Respiration Worksheet Set D
CBSE Class 10 Biology Life Processes Transporation Worksheet Set A
CBSE Class 10 Biology Life Processes Transporation Worksheet Set B
CBSE Class 10 Biology Life Processes Transporation Worksheet Set C
CBSE Class 10 Biology Life Processes Transporation Worksheet Set D
CBSE Class 10 Biology Life Processes Worksheet
CBSE Class 10 Biology Life Processes Worksheet Set A
CBSE Class 10 Biology Life Processes Worksheet Set B
CBSE Class 10 Biology Life Processes Worksheet Set C
CBSE Class 10 Biology Life Processes Worksheet Set D
CBSE Class 10 Biology Life Processes Worksheet Set E
Chapter 09 Heredity and Evolution
CBSE Class 10 Biology Heredity And Evolution Set D
Chapter 13 Magnetic Effects of Electric Current
CBSE Class 10 Physics Magnetic Effects of Electric Current Worksheet Set E

Practical CBSE Class 10 Science Worksheet

The above practice worksheet for Practical has been designed as per the current syllabus for Class 10 Science released by CBSE. Students studying in Class 10 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 10 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 10 Science students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 10 Science to develop the Science Class 10 worksheet. 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 10 Science designed by our teachers. After solving these you should also refer to Class 10 Science MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 10 Science which you can use to further make yourself better in Science.

Where can I download latest CBSE Practice worksheets for Class 10 Science Practical

You can download the CBSE Practice worksheets for Class 10 Science Practical for the latest session from StudiesToday.com

Are the Class 10 Science Practical Practice worksheets available for the latest session

Yes, the Practice worksheets issued for Practical Class 10 Science have been made available here for the latest academic session

Is there any charge for the Practice worksheets for Class 10 Science Practical

There is no charge for the Practice worksheets for Class 10 CBSE Science Practical you can download everything free

How can I improve my scores by solving questions given in Practice worksheets in Practical Class 10 Science

Regular revision of practice worksheets given on studiestoday for Class 10 subject Science Practical can help you to score better marks in exams

Are there any websites that offer free Practice test papers for Class 10 Science Practical

Yes, studiestoday.com provides all the latest Class 10 Science Practical test practice sheets with answers based on the latest books for the current academic session