Science notes for class 10

Science notes for class 10 Class 10 Science Notes | CBSE Class 10 Revision Notes

Class 10  science  notes, notes for class 10 ,  pdf  notes for class , very important notes , simple notes , handwritten , notes for topper , recap notes ,  alakhpandey physicswallah notes , dushyant Kumar notes, youtube notes , viral notes sir notes, the learning cell class 10 notes, anurag clearit medical notes , Shiksha ,pdf download  , Free read online notes , chapter summary question class 10 , most important notes ,easy notes , simple notes , dronstudy notes , board notes  class 10 cbseguide notes ,free  , revision notes , class  10 chapter  summary  very important question and answers , important notes with best questions and answers of all chapters , revision notes class 10 basic questions

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Notes for Class 10 Science Chapter-wise

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Simple notes -

Chapter 1 – Chemical Reactions and Equations

Chapter 2 –  Acids, Bases, and Salts

Chapter 3 –  Metals and Non-Metals

Chapter 4 –  Carbon and Its Compounds

Chapter 5 –  Periodic Classification of Elements

Chapter 6 – Life Processes

Chapter 7 – Control and Coordination

Chapter 8 – How Do Organisms Reproduce

Chapter 9 – Heredity and Evolution

Chapter 10 –  Light reflection and refraction

Chapter 11 –  Human eye and colorful world

Chapter 12 –  Electricity

Chapter 13 –  Magnetic effect of electric current

Chapter 14 –  Sources of energy

Chapter 15 – Our Environment

Chapter 16 – Management of Natural Resources

Handwritten notes 

Chapter 1 – Chemical Reactions and Equations

Chapter 2 – Acids, Bases, and Salts

Chapter 3 – Metals and Non-Metals

Chapter 4 – Carbon and Its Compounds

Chapter 5 – Periodic Classification of Elements

Chapter 6 – Life Processes

Chapter 7 – Control and Coordination

Chapter 8 – How Do Organisms Reproduce

Chapter 9 – Heredity and Evolution

Chapter 10 – Light reflection and refraction

Chapter 11 – Human eye and colorful world

Chapter 12 – Electricity

Chapter 13 – Magnetic effect of electric 

current

Chapter 14 – Sources of energy

Chapter 15 – Our Environment

Chapter 16 – Management of Natural Resources

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Very important question answer

Chapter Wise all chapters CBSE Quick Revision Notes and Key Points for Class 10 Science Pdf free download was planned by master educators from the most recent release of NCERT books to in board tests. NCERT Class 10 Science Notes contains physical science, science and science notes of all sections are essential for Revision Notes for Class 10. Here we have given CBSE Class 10 Science Notes. 

We prescribe you to read NCERT Solutions for Class 10 Science. CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries Marks. 

Very Important questions and Answers for Class 10

You can likewise Download  NCERT Solutions for class 10 science Syllabus and score more checks in your assessments. 

NCERT Class 10 Science Revision Notes 

 Class 10 Science Notes dependent on NCERT class 10 Science course reading

Class 10 Science Questions and Answers

QUESTION. Explain the reason for the reflection of the light beam that passes through the center of the curve of events etched in the same path.

ANS-The light in the middle of the slope is mirrored in the same way that the falling beam crosses the mirror, from the normal surface to the reflecting surface.

QUESTION.. What is the important function of ozone in the Earth's atmosphere?

ANS-Ozone is the natural process on Earth for all life. It protects our planet from UV rays because these UV rays are harmful to all living things. Therefore, any change in the size of this layer will automatically affect the lives of people, plants and animals that live on Earth.

QUESTION.The dark response to photosynthesis requires no light. Plants have a dark reaction at night. explained.

ANS-A dark reaction does not mean that it occurs in the absence of light, that is, at night. In fact, it's a reaction that happens simultaneously with a mild reaction. It is a chemical process that occurs independently of light. This reaction is based entirely on enzymes.

Get the full CBSE 10th Class Science Pack here. Important questions 1 mark

Answer important short questions

Here you will find important questions to answer in the CBSE Class 10 science papers.

Issues 15-24 of the 10th grade science journal require three points each. These must be answered in about 50-60 words each.

The types of brief questions that are important in the 10th grade CBSE test are:

QUESTION. How can we clearly see far and near things? Which part of the eye helps to change the curve of the lens? Why does the image not appear in a blind spot?

ANS. We can clearly see far and near things because of their attractive properties. Position is the name given to the ability of the lens of the eye to change its focal length and to place images that focus on distant and near objects on the retina.

Mushroom muscles help to change the curvature of the lens. It is fixed to the lens and contracted or edited to change the shape and curve of the lens.

No image is formed in the blind spot because there are no photoreceptors, i.e. cones and bars to detect light and send it to the brain.

H. a) What is the carbon characteristic that leads to the formation of large numbers of compounds? Select it

(B) What is the functional group of the following molecules?

(I) CH3CH2CH2OH:

(2) CH3COOH:

ANS 

(A) The carbon properties that lead to a large number of compounds are:

(I) catenation; it is the ability to bond with other carbon atoms.

(2) Trivalent: In four forces, carbon can be bonded to four other atoms.

Get detailed summary of the Chaptersfrom NCERT Science Textbooks of CBSE Class 10th. These summaries work as revision notes as well as important for examination purpose. Study materials of the NCERT Textbooks help in solving the extra and inside questions that are asked in exams. Summary or the Revision notesof the NCERT books will also help in understanding the chapters properly as it will contain the important points for revision purpose in short times.

(B)

composite

Functional group

(I) CH3CH2CH2OH

Ooh (hydroxyl group)

(2) CH3COOH

- Koh (carboxyl group)

Q: (a) Why is the image zoomed negative and positive for the virtual images?

(B) Why is a convex mirror used in the rearview mirrors rather than the concave mirror?

The answer.

(A) If the image is true, it will be flipped, which means that the image height will be considered negative. Also, the height of the object is always positive.

Now as Zoom = Image Height / Object Height.

So, in the case of the real image,

Magnification = Image Height (-) / Object Height (+) = Negative.

Therefore, the magnification will be negative.

Likewise, if the image is default, it will be installed.

So, in the case of the default image,

Zoom = Image Height (+) / Object Height (+) = Positive

Therefore, the magnification will be positive.

(B) A convex mirror is commonly used in vehicle rear-view mirrors because it gives a finished, realistic and large image of distant objects with a wider field of view. Consequently, convex mirrors enable the driver to display much more space which is not possible with a concave mirror.

Get here a full suite of CBSE Class 10 Science: brief important questions to answer type

Important long answer type questions

Get here a set of long questions for the type of answer that will be prepared for the five tag type questions:

Question numbers 25 to 30 will be asked in section C of the Grade 10 science paper with five marks. This should be the answer in 80-90 words each.

CBSE Class 10 important long answer type questions are:

Q: (a) What are Magnetic Field Lines? How is the direction of the magnetic field at a certain point determined?

(B) Draw two field lines around a strip magnet along its sides and mark the directions of the fields on it with arrow signs.

The answer.

(A) Magnetic field lines are the pictorial representation of the strength and direction of the magnetic field.

The direction of the magnetic field can be found at some point by placing a small magnetic compass at that point. The northern end of the compass needle indicates the direction of the magnetic field at its point of position.

(B) The magnetic field lines of the strip magnet exit from the North Pole and end at the South Pole. Within the magnet, field lines appear from the south pole and terminate at the north pole, as shown in the specific figure.

Q: (a) mention the pH range through which our body operates. Explain how antacids are

Give relief from acidity. Type the name of an antacid.

(B) Fresh milk has a pH of 6. How does the pH change as it turns into milk? Explain your answer.

(C) The milk man adds a very small amount of baking soda to fresh milk. Why does this milk take longer to set curd?

(D) State the nature of toothpastes. How to prevent tooth decay?

The answer.

(A) Our stomach has a pH equal to 2. Antacids neutralize the excess acid in the body and reduce hyperacidity. Sodium hydrogen carbonate is an antacid.

(B) The pH will decrease as it turns to curd because the curd is acidic due to the presence of lactic acid.

(C) Preparation of curd takes longer because bacteria do not work well in the presence of sodium hydrocarbons, i.e. fermentation will happen slowly.

(D) Toothpastes are essential in nature. It neutralizes the acid formed in the mouth that causes tooth decay.

Q. Eight atoms have elements A. B. C. D, E, F. G and H have the same number of electronic shells but a different number of electrons in the outermost shell. It was found that elements A and G combine to form an ionic compound. This compound is added in a small amount to almost all vegetable dishes during cooking. Oxides of elements A and B are essential in nature while E and F oxides are acidic. D oxide is almost nervous. Based on the above information, answer the following questions:

(1) To which group or period of the periodic table are the elements included?

(ii) What is the nature of the compound consisting of a mixture of eleme

(a) Mention the pH range within which our body works. Explain how antacids

give relief from acidity. Write the name of one such antacid.

(b) Fresh milk has a pH of 6. How does the pH will change as it turns to curd? Explain your answer.

(c) A milkman adds a very small amount of baking soda to fresh milk. Why does this milk take a longer time to set as curd?

(d) Mention the nature of toothpastes. How do they prevent tooth decay?

Ans.

(a) Our stomach has pH equal to 2. Antacids neutralize the excess of acid in our body and gives relief from hyperacidity. Sodium hydrogencarbonate is one of such antacid.

(b) pH will decrease as it turns to curd because curd is acidic due to the presence of lactic acid.

(c) It takes longer time to set as curd as bacteria do not work well in presence of sodium hydrogencarbonate, i.e. fermentation will take place slowly.

(d) Toothpastes are basic in nature. They neutralize the acid formed in mouth which causes tooth decay.

Q. Atoms of eight elements A. B. C. D, E, F. G and H have the same number of electronic shells but different number of electrons in their outermost shell. It was found that elements A and G combine to form an ionic compound. This compound is added in a small amount to almost all vegetable dishes during cooking. Oxides of elements A and B are basic in nature while those of E and F are acidic. The oxide of D is almost neural. Based on the above information answer the following questions:

(i) To which group or period of the periodic table do the listed elements belong?

(ii) What would be the nature of compound formed by a combination of elements B and F?

(iii) Which two of these elements could definitely be metals?

(iv) Which one of the eight elements is most likely to be found in gaseous state at room temperature?

(v) If the number of electrons in the outermost shell of elements C and G are 3 and 7 respectively, write the formula of the compound formed by the combination of C and G.

Ans.

(i) The listed chemicals belong to third period; it includes Na, Mg, Al, Si, P, S, Cl& Ar.

(ii) Compound formed by the combination of B (Mg) and F (S) will result in formation of salt called MgSO4

(iii) Compound A (Na) and B (Mg) are definitely metals as their oxides are basic in nature.

(iv) Element H (Ar), is likely to be found in gaseous state at room temperature as it is the 8th element of the group so it would have 8 electrons in its outermost shell which is the electronic configuration of an Nobel gas. 

(v) They will form AlCl3 (Aluminium chloride)

Get here the complete set of CBSE Class 10 Science: Important Long Answer Type Questions

Important Practical Based Questions

Here you will get the important questions based on practical skills. In Section A of CBSE Class 10 Science Exam Paper 2020, you may find some questions which are designed to test your practical knowledge. So, to acquire sufficient practical skills, practice the questions provided below:

Q. Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.

Ans.

Raw Materials Required For preparation of soap in laboratory are :

Vegetable oil

Sodium Hydroxide

Commom salt

Test to determine the nature of reaction mixture: When a red litmus paper is dipped in the reaction mixture, the paper changes its colour to blue. Hence, the reaction mixture of the saponification reaction is basic in nature.

Q. Write two precautions to be taken while identifying different parts of an embryo of a dicot seed.

Ans.

(i) The slide should be properly focused.

(ii) Slide should be observed first under low-power magnification and then under high-power magnification of the compound microscope.

Q. A student is to conduct an experiment to show CO2 is released during respiration. List two precautions that he/she must take for obtaining correct observation.

Ans.

Two precautions to be taken are:

(i) Germinating seeds (living) should be used.

(ii) The experiment set up must be air-tight.

Q1. What is the chemical name for baking soda? Also give a formula. (1)

Q2: Why should POP be stored in a moisture-resistant container? (1)

Q3: The name of the largest pulse in the human body. (1)

Q4: The name of the metal, which is the least reactive and the silver, is white. (1)

Q5: Sweet teeth lead to tooth decay. He explains. What is the role of toothpaste in tooth decay? (2)

Q6: When adding white "A" powder water causes strong reaction and large amount

The sword is relieved. Complex A is also used for white washing. Authentication, chemical giving

Reaction and product name. (2)

Q7: Why does copper turn green when it remains open? Also give chemical equation. (2)

Q8: Why does the ice cream vendor add ordinary salt to the ice cream to make ice cream? Imagine the reason

By giving chemical equation. (2)

Q9: What is a good source of energy? Give one example of a good source of energy. (2)

Q10: Does the state have two disadvantages to hydropower? (2)

Q11: Why not use the chain order for local circles? (2)

Q12: Why are toasters and fittings made from a mixture instead of pure metal? (2)

Q13: Discuss how to protect the brain and spinal cord. (3)

Q14: Expect the following salts to break down and give chemical equations: (3)

A) Sodium chloride.

B) magnesium sulfate.

C) potassium carbonate.

Q15: The acid name is as follows: (3)

A) cottage cheese.

B) bee sting.

C) lemon juice.

Q16: The atomic numbers of F, Na and Ne are 9, 10 and 11. Why do Na and F interact so much with each other?

Ni shows almost no reaction. (3)

Q17: Make a diagram of the biogas plant and name any three parts. (3)

Q18: SI unit of physical quantity is Om. Physical Quantity Name: What are the two factors?

Who depends? (3)

Q19: I am giving electricity to Trading Unit.

(3)

Second. Resistance electrical iron requires 20 O current from 5 A. Calculate the heat developed in 30 seconds.

Q20: List three factors on which the current coil of the magnetic field depends.

(3)
Q21. Type the following functions for the digestive process:

I) Hydrochloric acid ii) yellow II) pancreatic amylase

(3)

Q22. The name of two hormones secreted by the pancreas. Write down the function of each hormone named.

(3)

Q23. Give reasons for the following.

(3)

I) Glottis is covered by oboe.

B) The lung alveoli are covered with capillaries.

(3) The tracheal walls are supported by cartilage rings.

.Q24. Give reasons for the following: (5)

I) and B.P. Ionic compounds are high.

B) Clean deformed copper vessels with tamarind juice.

(3) Sulfide ore is converted to its oxide for mineral extraction.

D) Galvanization is the best way to prevent paint.

C) The chips are ejected with nitrogen gas.

or

Explain how the following metal is obtained from its compounds through the reduction process:

A) The name of the metal, which is located in the middle of the reaction chain.

B) Give its raw name and formula.

C) Give the relevant chemical reactions.

D) In ​​electrical refining of metals M, the name of the cathode, anode and electrolyte.

Q25. Draw a cross-section diagram of a sheet and name the following:

1) Chloroplast ii) Guard Cells iii) Lower Skin iv) Upper Skin

The two-stage name in photosynthesis

or

What is reflected work? Give two examples. Clarify the path followed by a letter from

Receptors in the reflex arc.

Name any five receptors with the organ in which they occur.

Q26. I. What is electrical energy? Write expressions of electrical energy. Select the SI unit from

electricity.

Second. The electric motor takes 5A current from a 220 volt line. Calculate strength, calculate also

Energy consumed in 2 hours.

(5)

(or)

I. Find the relationship of equivalent resistance to a group of three resistors

Connected in parallel.

Draw the necessary diagram

Second. Show how you can connect three resistors for each of the resistance 6 Ω so that

The mixture has a total resistance of 18 Ω.

Q27. Draw a diagram of the DC generator to explain its construction and name the following parts:

Armature coils, magnetic poles, split rings, brushes and battery. Give one difference between

Build an alternator and DC generators.

(5)

(or)

I) What are the three factors that put the force on the current load conductor in a

The magnetic field depends?

2) The left base of Fleming.

Section B.

Q28. When a few drops of phenol, phthalene are added to the curb. The solution of hydrochloric acid remains colorless. what will

The color of the final mixture when adding excess sodium hydroxide to this is:

the Red). C) green.

B) pink. D) blue.

Q29. Student adds de. Hydrochloric acid solution to a universal index. He notices this color of

The solution changes from colorless to:

the Red). C) green.

B) blue. D) yellow.


Q30. Two solutions A and B were found to have pH value 8 and 3, respectively. Inference that can be drawn
SHORT IMPORTANT QUESTION ANSWERS

1. What changes do you observe in the iron nails and colour of copper sulphate solution, if iron nails are dipped in CuSO4 solution for 15 minutes ?
2. Identify the chemical change : Melting of ice or conversion of milk into curd.
3. Why is respiration considered an exothermic reaction ?
4. Why do copper vessel lose shine when exposed to air ?
5. Potato chips manufacturers fill the packet of chips with nitrogen gas. Why ?
6. Why we store silver chloride in dark coloured bottles ?
7. Write a chemical equation of double displacement reaction.
8. N2 + 3H2 → 2NH3 , name the type of reaction.
9. What happens when milk is left open at room temperature during summers ?
10. What happens when quick lime is added to water ?

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SHORT TYPE QUESTIONS (2 Marks)

1. Define combination reaction. Give one example of combination reaction which is exothermic in nature.
2. What is decomposition reaction ? Explain with the help of an example.
3. Name and state the law which is kept in mind when we balance a chemical equation.
4. Give one example of each :
(a) Chemical reaction showing evolution of gas.
(b) Change in substance’s colour during a chemical reaction.
5. What is rancidity ? Write two ways by which it can be prevented.
6. What are two conditions which promotes corrosion ?
7. A small amount of ferrous sulphate is heated in hard glass tube.
(a) Write the chemical equation.
(b) What type of reaction is taking place.
8. What happens when Zn strip is dipped in CuSO4 solution ?

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SHORT TYPE QUESTIONS (3 Marks)

1. What is redox reaction ? Write down a chemical reaction representing it.

2. In electrolysis of water :
(a) Name the gas collected at cathode and anode.
(b) Why is volume of one gas collected at one electrode is double of another ?
(c) Why are few drops of dil. H2SO4 added to water ?

3. In the reaction
CuO (s) + H2 (g) → Cu(s) + H2O (g)
(a) Name the oxidized substance.
(b) Name the reduced substance.
(c) Name the oxidizing agent.

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4. Give reasons :
(a) White silver chloride turns grey in sunlight.
(b) Brown coloured copper powder on heating in air turns into black coloured substance.

5. Compound ‘X’ decomposes to form compound ‘Y’ and CO2 gas. Compound Y is used in manufacturing of cement.
(a) Name the compounds ‘X’ and ‘Y’.
(b) Write the chemical equation for this reaction.

6. A metal salt MX when exposed to light splits upto to form metal M and gas X2. Metal M is used to make ornaments whereas gas X2 is used in making bleaching powder. The salt MX is used in black & white photography.
(a) Identify the metal M and gas X2
(b)Identify MX.
(c) Write down the chemical reaction when salt MX is exposed to sunlight.

7. A metal strip X is dipped in blue coloured salt solution YSO4. After some time a layer of metal ‘Y’ is formed on metal strip X. Metal X is used in galvanization whereas metal Y is used for making electric wires.
(a) What could be metal ‘X’ and ‘Y’ ?
(b) Name the metal salt YSO4.
(c) What type of chemical reaction takes place between X and YSO4? Write the balanced chemical equation.

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1. What changes do you observe in the iron nails and colour of copper sulphate solution, if iron nails are dipped in CuSO4 solution for 15 minutes ?2. Identify the chemical change : Melting of ice or conversion of milk into curd.3. Why is respiration considered an exothermic reaction ?4. Why do copper vessel lose shine when exposed to air ?5. Potato chips manufacturers fill the packet of chips with nitrogen gas. Why ?6. Why we store silver chloride in dark coloured bottles ?7. Write a chemical equation of double displacement reaction.8. N2 + 3H2 → 2NH3 , name the type of reaction.9. What happens when milk is left open at room temperature during summers ?10. What happens when quick lime is added to water ?
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