CBSE Class 10 Science HOTs Question Acids Bases And Salts

Please refer to CBSE Class 10 Science HOTs Question Acids Bases And Salts. Download HOTS questions and answers for Class 10 Science. Read CBSE Class 10 Science HOTs for Chapter 2 Acids Bases Salts below and download in pdf. High Order Thinking Skills questions come in exams for Science in Class 10 and if prepared properly can help you to score more marks. You can refer to more chapter wise Class 10 Science HOTS Questions with solutions and also get latest topic wise important study material as per NCERT book for Class 10 Science and all other subjects for free on Studiestoday designed as per latest CBSE, NCERT and KVS syllabus and pattern for Class 10

Chapter 2 Acids Bases Salts Class 10 Science HOTS

Class 10 Science students should refer to the following high order thinking skills questions with answers for Chapter 2 Acids Bases Salts in Class 10. These HOTS questions with answers for Class 10 Science will come in exams and help you to score good marks

HOTS Questions Chapter 2 Acids Bases Salts Class 10 Science with Answers

ACIDS, BASES AND SALTS
HOTS: (High Order Thinking Skill) Questions with Answers:

 

CASE STUDY TYPE QUESTIONS

Salt of a strong acid and strong base is neutral with a pH value of 7. NaCl common salt is formed by a combination of hydrochloric acid and sodium hydroxide solution. This is the salt that is used in food. Some salt is called rock salt which was formed when seas of bygone ages dried up. The common salt thus obtained is an important raw material for various materials of daily use, such as sodium hydroxide, baking soda, washing soda, and bleaching powder.

Question. Which of the following does not form an acidic salt?
(a) Phosphoric acid
(b) Carbonic acid
(c) Hydrochloric acid
(d) Sulphuric acid
Answer : B

Question. Which of the following salts has no water of crystallization?
(a) Copper sulphate
(b) Washing soda
(c) Baking soda
(d) Gypsum
Answer : C

Question. The formula of baking soda is
(a) NaCl
(b) KHCO3
(c) NaHCO3
(d) Na2CO3
Answer : C

Question. Which of the following is treated with chlorine to obtain bleaching powder
(a) Ca SO4
(b) Ca (OH)2
(c) Mg (OH)2
(d) KOH
Answer : B

 

VERY SHORT ANSWER TYPE QUESTIONS

Question. Write the chemical name and formula of the compound which is used as an antacid
Answer : Sodium bicarbonate, NaHCO3

Question. Acidic and basic solutions in water conduct electricity. Why?
Answer : Because they produce hydrogen and hydroxide ions respectively.

Question. Which bases are called alkalies?
Answer : Soluble bases are called alkalies.

Question. The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a chemical equation for its formation
Answer : Baking soda (Sodium Hydrogen Carbonate)

Question. The pH of three solutions A, B and C are 4, 9 and 6 respectively. Arrange them in increasing order of acidic strength.
Answer : The increasing order of acidic strength is : B < C < A.

Question. Name the hardest substance in the body.
Answer : Tooth enamel (Calcium phosphate).

Question. Kazi and priyam want to prepare dil H2SO4 .Kazi added conc.H2SO4 to water slowly with constant stirring& cooling whereas Priyam added water to conc.H2SO4.Name the student who was correct and why?
Answer: Kazi was correct. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating.

 

SHORT ANSWER TYPE QUESTIONS

Question. A compound X is bitter in taste. It is a component of washing powder& reacts with dil.HCl to produce brisk effervescence due to colourless, odourless gas Y which turns lime water milky due to formation of Z. When excess of CO2 is passed, milkiness disappears doe to formation of P. Identify X, Y, and Z & P.
Answer :

CBSE Class 10 Science HOTs Question Acids Bases And Salts_2

Question. Compound P forms enamel of teeth. It is the hardest substance of the body. It does not dissolve in water but it is corroded when pH in the mouth is below 5.5. How does tooth paste prevent dental decay?
Answer : P = Ca3 (PO4)2. Bacteria present in the mouth produce acids by degradation of sugar and food particles remaining in the mouth after eating. Using toothpastes, which are generally basic, for cleaning the teeth can neutralize the excess acid and prevent tooth decay.

Question. The oxide of a metal M was water soluble when a blue litmus strip was dipped in this solution, it did not go any change in colour. Predict the nature of oxide
Answer : The Metal oxide (MO) is of basic in nature. It dissolves in water to form metal hydroxide as MO + H2O → M (OH)B lu e litmus does not undergo any change in colour in the basic medium.

Question. A first aid manual suggests that vinegar should be used to treat wasp sting and baking soda for bee stings.
(i) What does this information tell you about the chemical nature of the wasp stings
(ii) If there were no baking soda in the house, what other household substance could you use to treat bee stings?

Answer : (i) Since vinegar (acetic acid) is used to heal or neutralize the effect of wasp stings this means that the chemical present in the stings must be some base.
(ii) NH4OH

Question. `A` is a soluble acidic oxide and `B` is a soluble base. Compared to pH of pure water. What will be the pH of (a) solution of A (b) solution of B?
Answer : pH of A will be less than 7 and that of B will be more than 7.

Question. A road tanker carrying an acid was involved in an accident and its contents spilled on the road. At the side of the road, iron drain covers began melting and fizzing as the acid ran over them. A specialist was called to see if the acid actually leaked into the nearby river.
(a) Explain how the specialist could carry out a simple test to see if the river water contains some acid or not.
(b) The word melting is incorrectly used in the report. Suggest a better name that should have been used.
(c) Explain why drain covers began fizzing as the acid rain over them.

Answer : (a) By dipping a strip of blue litmus paper in to the sample of river water. If the colour changes to red this means that some acid has gone in to the river.
(b) Corrosion.
(c) Iron reacts with acid to evolve hydrogen gas.

 

Question 8. A compound `X` on electrolysis in aqueous solution produces a strong base. `Y` along with two gases `A` and `B`. `B` is used in manufacture of bleaching powder. Identify X, Y, A and B. Write chemical equations.
Answer :

CBSE Class 10 Science HOTs Question Acids Bases And Salts_8

 

Question 9. A yellow powder X gives a pungent smell if left open in air. It is prepared by the reaction of dry compound Y with chlorine gas. It is used for disinfecting drinking water. Identify X and Y. and write the reaction involved.
Answer :

CBSE Class 10 Science HOTs Question Acids Bases And Salts_9

 

Question 10. When CO2 gas pass through saturated solution of ammonical brine, two compound `X` and `Y` are formed. `Y` is used as antacid and decomposes to form another solid `Z`. Identify `X`,`Y`, `Z` and write chemical equations.
Answer :

CBSE Class 10 Science HOTs Question Acids Bases And Salts_10

 

Question 11.A compound `A on heating at 370 K gives `B` used as plaster for supporting fractured bones in the right position. `B` on mixing with water changes to `A`. Identify `A` and `B` and write the chemical reaction.
Answer :

CBSE Class 10 Science HOTs Question Acids Bases And Salts_11

Question 12. A few drops of phenolphthalein indicator were added to an unknown solution A. It acquired pink colour. Now another unknown solution B was added to it drop by drop and the solution becomes colorless. Predict the nature of A & B.
Answer : `A` is basic in nature as phenolphthalein has imparted pink colour to it. Sol `B` is an acid it has made solution A colourless by neutralizing by its basic effect.

Question. A student heated a few crystals of copper sulphate in a dry boiling tube.
(a) What will be the color of the copper sulphate after heating?
(b) Will you notice water droplets in the boiling tube?
(c) Where have these come from?
Answer :

(a) White
(b) Yes
(c) Copper sulphate crystals which seem to be dry contain water of crystallization.

Question. A substance `X` used in the kitchen for making tasty crispy pakoras.and is also an ingredient of antacid. Name the substance `X`.
(i) How does `X` help to make cakes and bread soft and spongy.
(ii) Is the pH value of solution of `X` is lesser than or greater than 7.0?

Answer :

CBSE Class 10 Science HOTs Question Acids Bases And Salts

(i) When CO2 gas escapes as bubbles it leaves behind pores which make the cake or bread soft and spongy.
(ii) It is a salt of strong base so the pH of the solution will be more than 7.0

Question : Kazi and priyam want to prepare dil H2SO4 .Kazi added conc.H2SO4 to water slowly with constant stirring& cooling whereas Priyam added water to conc. H2SO4.Name the student who was correct and why?
Answer : Kazi was correct. If water is added to a concentrated acid, the heat generated may cause the mixture to splash out and cause burns. The glass container may also break due to excessive local heating.

Question : Compound P forms enamel of teeth. It is the hardest substance of the body. It does not dissolve in water but it is corroded when pH in the mouth is below 5.5. How does tooth paste prevent dental decay?
Answer : P = Ca3 (PO4)2. Bacteria present in the mouth produce acids by degradation of sugar and food particles remaining in the mouth after eating. Using toothpastes, which are generally basic, for cleaning the teeth can neutralize the excess acid and prevent tooth decay.

Question : The oxide of a metal M was water soluble when a blue litmus strip was dipped in this solution, itmdid not go any change in colour. Predict the nature of oxide
Answer : The Metal oxide (MO) is of basic in nature. It dissolves in water to form metal hydroxide as MO + H2O -> M (OH) 2 B lue litmus does not undergo any change in colour in the basic medium.

Question : A first aid manual suggests that vinegar should be used to treat wasp sting and baking soda for bee stings.
(i) What does this information tell you about the chemical nature of the wasp stings
(ii) If there were no baking soda in the house, what other household substance could you use to treat bee stings?
Answer : (i) Since vinegar (acetic acid) is used to heal or neutralize the effect of wasp stings this means that the chemical present in the stings must be some base.
(ii)NH4OH

Question. To a solution of sodium hydroxide in a test tube, two drops of phenolphthalein are added.
(i) State the colour change observed.
(ii) If dil HCl is added dropwise to the solution, what will be the colour change?
(iii) On adding few drops of NaOH solution to the above mixture the colour of the solution reappears. Why?
Answer : (i) On adding phenolphthalein to NaOH solution, the colour becomes pink.
(ii) On adding dilute HCl solution dropwise to the same test tube, the pink colour disappears and the solution again becomes colourless.
(iii) On again adding NaOH to the above mixture, pink colour reappears because the medium becomes basic again.

Question. A gas X reacts with lime water and forms a compound Y which is used as bleaching agent in the chemical industry. Identify X and Y. Give the chemical equation of the reaction involved.
Answer : X is chlorine Y is CaOCl2 (calcium oxy chloride) used as bleaching agent.
Ca (OH) 2+ Cl2 -------------- CaOCl2 +H2O

Question. You are given two solutions A and B. The pH of solution A is 6 and pH of solution B is 8.
(i) Which solution is acidic and which is basic?
(ii) Which solution has more H+ ion concentration?
(iii) Why is HCl a stronger acid than acetic acid?
Answer : (i) The solution with pH 6 is acidic while the solution with pH 8 is basic.
(ii) The solution with pH 6 has more H+ ion concentration.
(iii) HCl is a stronger acid than CH3COOH since its degree of dissociation
(α) is more or it releases more H+ ions in solution than acetic acid.

Question : A road tanker carrying an acid was involved in an accident and its contents spilled on the road. At the side of the road,  ron drain covers began melting and fizzing as the acid ran over them. A specialist was called to see if the acid actually leaked into the nearby river.
(a) Explain how the specialist could carry out a simple test to see if the river water contains some acid or not.
(b) The word melting is incorrectly used in the report. Suggest a better name that should have been used.
(c) Explain why drain covers began fizzing as the acid rain over them.
Answer : (a) By dipping a strip of blue litmus paper in to the sample of river water. If the colour changes to red this means that some acid has gone in to the river.
(b) Corrosion.
(c) Iron reacts with acid to evolve hydrogen gas.

Question : A few drops of phenolphthalein indicator were added to an unknown solution A. It acquired pink colour. Now another unknown solution B was added to it drop by drop and the solution becomes colorless. Predict the nature of A & B.
Answer : Sol `A` is basic in nature as phenolphthalein has imparted pink colour to it. Sol `B` is an acid it has made solution A colourless by neutralizing by its basic effect.

Question : A student heated a few crystals of copper sulphate in a dry boiling tube.
a) What will be the color of the copper sulphate after heating?
(b) Will you notice water droplets in the boiling tube?
c) Where have these come from?
Answer : (a) White (b) Yes (c) Copper sulphate crystals which seem to be dry contain water of crystallization.

Question : A substance `X` used in the kitchen for making tasty crispy pakoras.and is also an ingredient of antacid. Name the substance `X`.
(i) How does `X` help to make cakes and bread soft and spongy.
(ii) Is the pH value of solution of `X` is lesser than or greater than 7.0?
Answer : ( i) When CO2 gas escapes as bubbles it leaves behind pores which make the cake or bread soft and spongy.
(ii) It is a salt of strong base so the pH of the solution will be more than 7.0

Question : After drinking access of cold drink, a person suffered from acidity. Explain?
Answer : Cold drink contains carbon dioxide dissolved in them under pressure. Some amount of the gas escapes when a bottle of cold drink is opened while a portion of it remain dissolved. Carbon dioxidemdissolved in water forms a weak acid, carbonic acid. Consumption of excess of cold drink accumulation of carbonic acid in the stomach which is responsible for the development of acidity.

Question : Although acetic acid is highly soluble in water but still it is a weak acid. Explain why?
Answer : The strength of an acid depends upon the extent of ionization. Acetic acid is highly soluble in water but it dissociates partially in the aqueous solution to produce a small amount of H+ ions and , therefore, considered as a weak acid.

Please refer to link below for CBSE Class 10 Chemistry Hots-Acids Bases and Salts.

Acids Bases And Salts

1) Acids are sour in taste, turn blue litmus red, and dissolve in water to release H+ ions e.g. HCl, H2SO4, HNO3 etc.
 
2) Bases are bitter in taste, have soapy touch, turn red litmus blue and give hydroxide ions in solution. e.g. NaOH, KOH etc.
 
3) A salt is a compound which is formed by neutralization reaction between an acid and base. e.g. sodium chloride.
 
4) Indicators – Indicators are substances which indicate the acidic or basic nature of the solution by their colour change.
The colour of some acid – base indicators in acidic and basic medium are given below
 CBSE_Class_10_Science_Acid_Bases_And_Salts_1
5) Chemical properties of acids:
i) Acids react with active metals to give hydrogen gas.
Zn + H2SO4    ZnSO4 + H2
 
ii) Acids react with metal carbonate and metal hydrogen carbonate to give carbon dioxide.
NaHCO3 +HCl    NaCl + H2O + CO2
 
iii) Acids react with bases to give salt and water. This reaction is called as neutralization reaction.
NaOH + HCl    NaCl +H2O
 
iv) Acids react with metals oxides to give salt and water.
CuO + H2SO4  →  CuSO4 + H2O
 
6) Chemical properties of Bases:
i) Reaction with Metals - Certain reactive metals such as Zinc, Aluminium, and Tin react with alkali solutions on heating and hydrogen gas is evolved.
2NaOH + Zn   Na2ZnO2 +H2
 
ii) Reaction with acids -Bases react with acids to form salt and water.
KOH +HCl   KCl +H2O
 
iii) Reaction with Non -metallic oxides – These oxides are generally acidic in nature. They react with bases to form salt and water.
2NaOH + CO2     Na2CO3 + H2O
 
7) PH Scale: The concentration of hydrogen ion in solution is expressed in terms of pH. The pH of a solution is defined as the negative logarithm of hydrogen ion concentration in moles per litre.
                          pH = - log [H+]
               For water or neutral solutions, pH = 7
               For acidic solutions, pH < 7
               For basic solutions, pH > 7
 
8) Some Important Chemical Compounds:
a) Common Salt (NaCl)
 
Sodium chloride is known as common salt. Its main source is sea water. It is also exists in the form of rocks and is called rock salt.
Common salt is an important component of our food. It is also used for preparing sodium hydroxide, baking soda, washing soda etc.
 
b) Sodium Hydroxide or Caustic Soda (NaOH)
It is prepared by passing electricity through an aqueous solution of sodium chloride also known as brine.
2NaCl (aq) + 2 H2O (l)    2NaOH (aq) + Cl2 (g) + H2 (g)
This process is known as chlor-alkali process.
 
Properties:
1. It is white translucent solid.
2. Crystals of sodium hydroxide are deliquescent.
3. It is readily soluble in water and gives strong alkaline solution.
 
c) Bleaching Powder (CaOCl2)
Its chemical name is calcium oxychloride. It is prepared by passing chlorine gas through dry slaked lime.
Ca (OH) 2 + Cl2    CaOCl2 + H2O
 
Uses –
1. For bleaching cotton and linen in textile industry.
2. For disinfecting drinking water.
3. For bleaching wood pulp in paper industry.
 
d) Baking Soda (NaHCO3)
Chemical name is Sodium hydrogen carbonate.
It is prepared by passing CO2 gas through brine solution saturated with ammonia.
NaCl + H2O +CO2 +NH3   NH4Cl + NaHCO3
 
Properties:
1. It is white crystalline solid and sparingly soluble in water at room temperature.
2. On heating it decomposes to give sodium carbonate and carbon dioxide.
3. It reacts with acids to give carbon dioxide gas.
4. It aqueous solution is weak alkaline due to hydrolysis.
 
Uses:
1. It is used in soda – acid fire extinguisher.
2. It acts as mild antiseptic and antacid.
3. It is used as a component of baking powder. In addition to sodium hydrogen carbonate baking soda contains tartaric acid.
 
e) Washing Soda (Na2CO3.10 H2O)
Chemical name is sodium carbonate decahydrate.
It is prepared by heating baking soda. Recrystallisation of sodium carbonate gives washing soda.
2NaHCO3  →   Na2CO3 +H2O +CO2
Na2CO3 +10 H2  Na2CO3 . 10 H2O
 
Uses:
1. It is used for removing permanent hardness of water.
2. It is used in glass, soap and paper industries.
3. It can be used as a cleaning agent for domestic purposes.
f) Plaster of Paris (CaSO4.1/2H2O)
Its chemical name is calcium sulphate hemihydrates. It is obtained by heating Gypsum upto 373K.
CaSO4.2H2   CaSO4.1/2H2O + 11/2H2O
 
On treatment with water it is again converted into gypsum and sets as a hard mass.
CaSO4.1/2H2O+11/2H2O    CaSO4.2H2O
 
Uses:-
1. It is used by doctors for setting fractured bones.
2. It is used for making statues, models and other decorative materials.
 
SUGGESTED ACTIVITIES
1. Reaction of zinc granules with dilute sulphuric acid and testing hydrogen gas by burning
2. Preparation of carbon dioxide gas by sodium carbonate and sodium hydrogen carbonate and passing through calcium hydroxide solution.
3. Acid solution in water conducts electricity.
4. Testing of pH values of given solutions.
5. Removing water of crystallisation from crystals of copper sulphate.
 
HOTS QUESTIONS
 
Question. In one of the industrial process used for manufacture of sodium hydroxide, a gas 'X'  is formed as by – product. The gas 'X' reacts with lime water to give a compound  'Y‘ which is used as a bleaching agent in chemical industry. Identify 'X' and 'Y' giving the chemical equation of the reaction.
Answer. In the manufacture of sodium hydroxide, hydrogen gas and chlorine gas (X) are formed as by products. When chlorine gas (X) reacts with lime water, it forms calcium oxy chloride (bleaching powder) Y.
2NaCl (aq) + 2 H2O (L)   2NaOH (Aq) + Cl2 (G) + H2 (G)
'X'   Cl2 gas
Ca(OH)2 + Cl2    CaOCl2 + H2O
 
Question. Dry hydrogen chloride gas does not turn blue litmus, whereas hydrochloric acid does. Why?
Answer. In the dry state, hydrogen chloride (HCl) does not release H+ ions. Therefore, it cannot behave as an acid. When dissolved in water, it forms hydrochloric acid. It dissociates to give H+ ions in solution and behaves as an acid.
 
Question. Acid when react with metals release hydrogen gas but there is one acid which when reacts with metals does not release hydrogen except for two metals. Prove this statement.
Answer. Acid + Metal    Salt + Hydrogen
e.g. 2HCl + 2Na   2NaCl + H2
H2SO4 + 2Na   Na2SO4 + H2
HNO3 + Na    No hydrogen gas.
Because nitric acid is strong oxidising agent. Nitric acid reacts only with Mg and Mn to give hydrogen gas.
Mg + 2HNO3    Mg(NO3)2 + H2
Mn + 2HNO3   Mn(NO3)2 + H2
1. A compound ‘X’ is an important ingredient of an antacid. It is also used in fire extinguisher. Identify ‘X’.
2. Plaster of Paris should be stored in moisture proof container. Why? 
3. When acid rain flows into rivers the aquatic lives are affected. Why? 
4. Both glucose and HCl contain hydrogen in them, but HCl shows acidic character Whereas glucose does not. Why? 
5. Under what soil condition do you think a farmer would treat the soil of his field with Quicklime, slaked lime or chalk? 
6. A person is caused with burns while adding water into a concentrated acid. What was the reason behind it? 
7. Why do acids not show acidic behavior in the absence of water? 
8. What is the colour change when a stain of curry on a white cloth comes in contact with soap? And why? 
9. A colourless compound ‘x’ obtained from sea water used in daily meals is taken in a test tube .Conc.H. 2SO4 was added to the test tube. , a pungent smelling gas ‘Y’ comes out which does not affect dry blue litmus paper but turns moist blue litmus paper red. Identify ‘X’ and ‘Y’. 
10. Compound ‘X’ forms enamel of teeth. It is the hardest substance of the body.
It does not dissolve in water but it is corroded when PH in the mouth is below 5.5.Write the chemical reactions involved. 
11. A metal is found in the lab in the form of grey colored granules. It reacts with dil.H2SO4 to form a gas which burns with a pop sound. Identify the metal .It also reacts with caustic soda to liberate the same gas. Write chemical reactions involved.
12. ‘A’ is soluble acidic oxide and ‘B’ is soluble base. Compared to the pH of pure, water what will be the pH of solution A and solution B? 
13. A few drops of phenolphthalein were added to an unknown solution
A.it acquired pink colour. Now another unknown solution B was added to it drop by drop. The solution became colorless. What is the nature of A and B?
14. A milk man adds a very little amount of baking soda to fresh milk.
a) Why does he shift the pH of fresh milk?
b) What do you expect to observe when milk comes to boil

 

PRACTICE QUESTIONS

1. A substance changed its colour on heating in a closed vessel but regained it after sometime when allowed to cool and exposed to air. Name the substance. Explain the phenomenon involved.

2. What do you understand by the term Hyperacidity in a patient? What is the remedy for it?

3. A person caused burns while adding water into a concentrated acid. What was the reason behind it?

4. Why are same perishable food preserved in vinegar?

5. A doctor applied surgical bandages on fractured bones of a patient after making them wet. What changes are likely to occur?

6. Tooth enamel is one of the hardest substances in our body yet damage occurs when chocolates & sweets are eaten? Why? What will you do to prevent it?

7. An important chemical which is used in manufacture of glass, soap, paper and is also used as a cleansing agent for domestic purposes. Name it; write formula and also its chemical name.

8. Why curd or sour substance should not be kept in brass or copper container?

9. Name two synthetic indicators? What are its effects in a acidic and basic solutions?

10. Name the substance present in

1) Bee sting

2) Stinging hair of nettle leaves.

What should be the nature of substance for its remedy?

Chapter 01 Chemical Reactions and Equations
CBSE Class 10 Science HOTs Chemical Reactions and Equations
Chapter 03 Metals and Non-Metals
CBSE Class 10 Science HOTs Metals and Non Metals
Chapter 05 Periodic Classification of Elements
CBSE Class 10 Science HOTs Periodic Classification of Elements
Chapter 08 How do the Organisms Reproduce
CBSE Class 10 Science HOTs Question How Do Organisms Reproduce
Chapter 10 Light Reflection and Refraction
CBSE Class 10 Science HOTs Reflection and Refraction
Chapter 13 Magnetic Effect of Electric Current
CBSE Class 10 Science HOTs Magnetic Effects of Electric Current
Chapter 16 Sustainable Management of Natural Resources
CBSE Class 10 Science HOTs Question Management of Natural Resources
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What does HOTS stand for in Class 10 Science Chapter 2 Acids Bases Salts

HOTS stands for "Higher Order Thinking Skills" in Chapter 2 Acids Bases Salts Class 10 Science. It refers to questions that require critical thinking, analysis, and application of knowledge

How can I improve my HOTS in Class 10 Science Chapter 2 Acids Bases Salts

Regular revision of HOTS given on studiestoday for Class 10 subject Science Chapter 2 Acids Bases Salts can help you to score better marks in exams

Are HOTS questions important for Chapter 2 Acids Bases Salts Class 10 Science exams

Yes, HOTS questions are important for Chapter 2 Acids Bases Salts Class 10 Science exams as it helps to assess your ability to think critically, apply concepts, and display understanding of the subject.