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Students of class 10 Science should refer to MCQ Questions Class 10 Science Acids Bases Salts with answers provided here which is an important chapter in Class 10 Science NCERT textbook. These MCQ for Class 10 Science with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Class 10 Science. The following MCQs can help you to practice and get better marks in the upcoming class 10 Science examination

Chapter 2 Acids Bases Salts MCQ with Answers Class 10 Science

MCQ Questions Class 10 Science Acids Bases Salts provided below have been prepared by expert teachers of grade 10. These objective questions with solutions are expected to come in the upcoming Standard 10 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question: Which of the following is not a mineral acid?
(a) Hydrochloric acid
(b) Citric acid
(c) Sulphuric acid
(d) Nitric acid       

Question: Which of the following acid is present in sour milk ?
(a) glycolic acid
(b) lactic acid
(c) citric acid
(d) tartaric acid   

Question: To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is:
(a) Acidic
(b) Neutral
(c) Basic
(d) Corrosive 

Question: During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to:
(a) absorb the evolved gas.
(b) moisten the gas.
(c) absorb moisture from the gas.
(d) absorb Cl– ions from the evolved gas.   

Question: The product of complete neutralization of H3PO3 withNaOH is :
(a) NaH₂PO₃
(b) Na₂HPO₃
(c) Na₃PO₃
(d) Na₃(HPO₃)₂ 

Question: Chemical A is used for water softening to remove temporary hardness. ‘A’ reacts with sodium carbonate to generate caustic soda. What is ‘A’?
(a) Gypsum
(b) Slaked lime
(c) Quick lime
(d) Lime stone   

Question: An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solution ‘A’ and ‘B’.
(a) A is strongly basic and B is a weak base.
(b) A is strongly acidic and B is a weak acid.
(c) A has pH greater than 7 and B has pH less than 7.
(d) A has pH less than 7 and B has pH greater than 7.   

Question: A blue litmus paper was first dipped in dil. HCl and then in dil. NaOH solution. It was observed that the colour of the litmus paper –
(a) changed to red.
(b) changed first to red and then to blue.
(c) changed blue to colourless.
(d) remains blue in both the solutions.   

Question: The acid used in making vinegar is –
(a) formic acid
(b) acetic acid
(c) sulphuric acid
(d) nitric acid   

Question: An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid   

Question: Reaction of an acid with a base is known as –
(a) decomposition
(b) combination
(c) redox reaction
(d) neutralization 

Question: When CO2 is passed through lime water, it turns milky.The milkiness in due to formation of –
(a) CaCO₃
(b) Ca(OH)₂
(c) H₂O
(d) CO₂   

Question: Antacids contain –
(a) weak base
(b) weak acid
(c) strong base
(d) strong acid     

Question: CuO + (X) → CuSO₄ + H₂O. Here (X) is –
(a) CuSO₄
(b) HCl
(c) H₂SO₄
(d) HNO₃   

Question: Bleaching powder gives smell of chlorine because it –
(a) is unstable.
(b) gives chlorine on exposure to atmosphere.
(c) is a mixture of chlorine and slaked lime.
(d) contains excess of chlorine.     

Question: Plaster of paris is made from –
(a) lime stone
(b) slaked lime
(c) quick lime
(d) gypsum   

Question: 2NaOH + MgSO₄ ––––→ ?
(a) MgO + Na₂SO₄
(b) Mg(OH)₂ + Na₂SO₄
(c) Mg(OH)₂ + Na₂O
(d) MgO + Na₂O     

Question: Washing soda has the formula –
(a) Na₂CO₃.7H₂O
(b) Na₂CO₃.10H₂O
(c) Na₂CO₃.H₂O
(d) Na₂CO₃ 

Question: Plaster of Paris hardens by –
(a) giving of CO₂
(b) changing into CaCO₃
(c) combining with water
(d) giving out water   

Question: The reaction of metal with acid results in the formation of–
(a) only hydrogen gas
(b) only salt
(c) both salt and hydrogen gas
(d) none of these   

Question: Which of the following acid does not react with metals?
(a) sulphuric acid
(b) phosphoric acid
(c) carbonic acid
(d) nitric acid 

Question: Which of the following is acidic in nature?
(a) apple juice
(b) soap solution
(c) slaked lime
(d) lime   

Question: ‘Alum’ is an example of –
(a) single salt
(b) double salt
(c) acids
(d) none of these   

Question: When an oxide of a non–metal reacts with water which of the following is formed?
(a) Acid
(b) Base
(c) Salt
(d) None of these 

Question: A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
(a) Lemon juice
(b) Vinegar
(c) Common salt
(d) An antacid 

Question: Plaster of paris is obtained –
(a) by adding water to calcium sulphate.
(b) by adding sulphuric acid to calcium hydroxide.
(c) by heating gypsum to a very high temperature.
(d) by heating gypsum to 373 K. 

Question: Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(iii) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)   

Question: Of the aqueous solutions listed below, which would be the best conductor of an electric current?
(a) HCl
(b) H₃PO₄
(c) HOCl
(d) CH₃COOH   

Question: Common salt besides being used in kitchen can also be used as the raw material for making 
(i) washing soda (ii) bleaching powder
(iii) baking soda (iv) slaked lime
(a) (i) and (ii)
(b) (i), (ii) and (iv)
(c) (i) and (iii)
(d) (i), (iii) and (iv) 

Question: What is the term for the positive and negative ions of a compound breaking apart in solution –
(a) Conglomeration
(b) Oxidation
(c) Dissociation
(d) None of the Above 

Question: Which salt can be classified as an acid salt?
(a) Na₂SO₄
(b) BiOCl
(c) Pb(OH)Cl
(d) Na₂HPO₄   

Question: An element X reacts with dilute H2SO4 as well as with NaOH to produce salt and H2(g). Hence, it may be concluded that:
I. X is an electropositive element.
II. oxide of X is basic in nature.
III. oxide of X is acidic in nature.
IV. X is an electronegative element.
(a) I, II, III
(b) IV, I, II
(c) III, IV, I
(d) II, III, IV   

Question: The correct order of increasing pH values of the aqueous solutions of baking soda, rock salt, washing soda and slaked lime is 
(a) Baking Soda < Rock Salt < Washing Soda < Slaked lime
(b) Rock Salt < Baking Soda < Washing Soda <Slaked lime
(c) Slaked lime < Washing Soda < Rock Salt < Baking Soda
(d) Washing Soda < Baking Soda < Rock Salt < Slaked lime   

Question: You are provided with aqueous solutions of three salts — A, B and C, 2-3 drops of blue litmus solution, red litmus solution and phenolphthalein were added to each of these solution in separate experiments. The change in colours of different indicators were recorded in the following table:     

On the basis of above observations, identify A, B, and C from the following options:       
(a) A = NH₄ Cl, B = N_aCl, C = CH₃COONa
(b) A = NH₄ Cl, B = CH₃ COONa, C = NaCl
(c) A = NaCl, B = NH₄ Cl, C = CH₃ COONa
(d) A = CH₃ COONa, B = NH₄ Cl, C = NaCl

Question:The chemical formula of ‘Plaster of Paris’ is
(a) CaSO₄.1/2 H₂O
(b) CaSO₄.2H₂O
(c) CaSO₄.H₂O
(d) CaSO₄.3/ 2H2O.     

Question: A solution turns red litmus blue. Its pH is likely to be –
(a) 2
(b) 4
(c) 5
(d) 10   

Question: Aqua regia is the mixture of conc. HCl and conc. HNO3
in the ratio:
(a) 1 : 3
(b) 2 : 3
(c) 3 : 1
(d) 3 : 2   

Question: Which of the following type of medicines is used for treating indigestion ?
(a) Antibiotic
(b) Analgesic
(c) Antacid
(d) Antiseptic     

Question: 10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise will be –
(a) 4 mL
(b) 8 mL
(c) 12 mL
(d) 16 mL   

Question: A solution reacts with crushed egg-shells to give a gas that turns lime water milky. The solution contains –
(a) NaCl
(b) HCl
(c) LiCl
(d) KCl   

Question: Which of the following reaction does not results in the evolution of H2 gas?
(a) dilute sulphuric acid reacts with zinc granules.
(b) dilute hydrochloric acid reacts with magnesium ribbon.
(c) dilute sulphuric acid reacts with aluminium powder.
(d) dilute hydrochloric acid with diute sodium hydroxide
solution. 

Question. What is formed when zinc reacts with sodium hydroxide?
(a) Zinc hydroxide and sodium
(b) Sodium zincate and hydrogen gas
(c) Sodium zinc-oxide and hydrogen gas
(d) Sodium zincate and water

Question. When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
(a) absorb the evolved gas
(b) moisten the gas
(c) absorb moisture from the gas
(d) absorb Cl – ions from the evolved gas

Question. An aqueous solution with pH-zero is
(a) Acidic
(b) Alkaline
(c) Neutral
(d) Amphoteric

Question. Plaster of Paris is made from
(a) Lime stone
(b) Slaked Lime
(c) Quick lime
(d) Gypsum

Question. The or dour of acetic acid resembles that of
(a) Rose
(b) Burning Plastic
(c) Vinegar
(d) Kerosene

Question. When copper oxide and dilute hydrochloric acid react, colour changes to
(a) white
(b) bluish-green
(c) blue-black
(d) black

Question. A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
(a) Lemon juice
(b) Vinegar
(c) Common salt
(d) An antacid

Question. Which of the following salts does not contain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Washing soda
(d) Gypsum

Question. Assertion: Ammonium hydroxide is Weak Base
Reason: Phenolphthalein becomes pink in NH₂OH
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.

Question. Ag ₂ S reacts with H ₂ SO ₄ to form
(a) AgSO ₄
(b) Ag ₂ SO ₄ + H ₂ S
(c) Ag ₂ O + H ₂ S
(d) AgOH + H ₂ S

Question. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid

Question. Sodium hydroxide is used
(a) as an antacid
(b) in manufacture of soap
(c) as a cleansing agent
(d) in alkaline batteries

Question. A solution reacts with crushed egg-shells to give a gas that turns lime-water milkey. The solution contains
(a) NaCl
(b) HCl
(c) LiCl
(d) KCl

Question. How many water molecules does hydrated calcium sulphate contain?
(a) 5
(b) 10
(c) 7
(d) 2

Question. Nettle sting is a natural source of which acid?
(a) Metiwanoic acid
(b) Lactic acid
(c) Citric acid
(d) Tartaric acid

Question. Alkalis are
(a) acids, which are soluble in water
(b) acids, which are insoluble in water
(c) bases, which are insoluble in water
(d) bases, which are soluble in water

Question. Plaster of Paris hardens by
(a) Giving off CO ₂
(b) Changing into
(c) Combining with water CaCO ₃ 
(d) Giving out water

Question. The odour of acetic acid resembles that of
(a) Rose
(b) Burning Plastic
(c) Vinegar
(d) Kerosene

Question. 10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of same solution of NaOH, the amount of HCl solution required to neutralize it will be
(a) 4 mL
(b) 8 mL
(c) 12 mL
(d) 16 mL

Question. If pH of solution is 13, it means that if is
(a) Weakly acidic
(b) Weakly basic
(c) Strongly acidic
(d) Strongly Basic

Question. The H ⁺ ion concentration of a solution is 1.0×10 ^-5 m. The solution is
(a) Acidic
(b) Alkaline
(c) Neutral
(d) Amphoteric

Question: Many salts absorbs water from atmosphere. This property is called
(a) deliquescence
(b) efflorescence
(c) hydration
(d) addition 

Question: A solution of NaCl
(i) will turn red litmus blue
(ii) will turn pH paper green
(iii) will turn blue litmus red
(iv) will not affect litmus
(a) (i) and (ii)
(b) (i), and, (iii)
(c) (i) and (iv)   

Question: Curd cannot be stored in
(z) Brass vessel
(ii) Copper vessel
(iii) Steel
(iv) Bronze
(a) (i), (ii), (iii)
(b) (ii), (iii), (iv)
(c) (i), (ii), (iv)
(d) (i), (iii), (iv)   

Question: An aqueous solution with pH = 1 is
(a) strongly acidic
(b) strongly basic
(c) neutral
(d) weakly acidic 

Question: What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases
(ii) The temperature of the solution decreases
(iii) The temperature of the solution remains the same
(iv) Salt formation takes place.
(a) (i) only
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv) 

Question: During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
(a) absorb the evolved gas
(b) moisten the gas
(c) absorb moisture from the gas
(d) absorb CL ions from the evolved gas 

Question: Which of the following salts does not contain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Washing soda
(d) Gypsum 

Question: An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking power
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid 

Question: Calcium phosphate is present in tooth enamel. Its nature is
(a) basic
(b) acidic
(c) neutral
(d) amphoteric 

Question: A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?
(a) Lemon juice
(b) Vinegar
(c) Common salt
(d) An antacid 

Question: Sodium carbonate is a basic salt because it is a salt of 
(a) strong acid and strong base.
(b) weak acid and weak base.
(c) strong acid and weak base.
(d) weak acid and strong base.

Question: Which one of the following can be used as an acid-base indicator by a visually impared (blind) student ?
(a) Litmus
(b) Turmeric
(c) Vanilla essence
(d) Petunia leaves 

Question: In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus was set up. Which among the following statement)s) is (are) correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only   

Question: Which of the following gives the correct increasing order of acidic strength ?
(a) Water < Acetic acid < Hydrochloric acid
(b) Water < Hydrochloric acid < Acetic acid
(c) Acetic acid < Water < Hydrochloric acid
(d) Hydrochloric acid < Water < Acetic acid 

Question: Which of the following is used for dissolution of gold ?
(a) Hydrochloric acid
(b) Sulphuric acid
(c) Nitric acid
(d) Aqua regia

Question: Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper.What would be the colour obtained? (You may use colour guide given in figure)
(a) Red
(b) Yellow
(c) Yellowish green  
(d) Blue 

Question: Which of the following is(are) true when HCl (g) is passed through water ?
(i) It does not ionise in the solution as it is a covalent compound.
(ii) It ionises in the solution.
(iii) It gives both hydrogen and hydroxyl ion in the solution.
(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule.
(a) (i) only
(b) (iii) only
(c) (ii) and (iv)
(d) (iii) and (iv)   

Question: Which of the following statement is not correct?
(a) All metal carbonates react with acid to give salt, water and carbon dioxide.
(b) All metal oxides react with water to give salt and acid.
(c) Some metals react with acids to give salt and hydrogen.
(d) Some non-metal oxides react with water to form an acid. 

Question: NaHCO, formed by reaction of
(a) NaOH + H₂CO₃
(b) NaCl + H₂CO₃
(c) Na₂CO₃ + HCl
(d) NaOH + Na₂CO₃  

Question: Which of the following are present in a dilute aqueous solution of hydrochloric acid?
(a) H₃O+ + Cl–
(b) H₃O+ + OH–
(c) Cl– + OH–
(d) unionised HCl   

Question: pH of H₂0 is
(a) 7
(b) 8
(c) 9
(d) 10

Question: Which of the following statements is true for acids?
(a) Bitter and change red litmus to blue.
(b) Sour and change red litmus to blue.
(c) Sour and change blue litmus to red.
(d) Bitter and change blue litmus to red 

Question: Lime water reacts with chlorine to form
(a) CaCl₂
(b) CaOCl₂
(c) Ca(ClO₃)²
(d) CaO₂Cl₂

Question. Which one of the following salts does not con-tain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Washing soda
(d) Gypsum

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We hope the above multiple choice questions for Class 10 Science for Chapter 2 Acids Bases Salts provided above with answers based on the latest syllabus and examination guidelines issued by CBSE, NCERT and KVS are really useful for you. Acids Bases Salts is an important chapter in Class 10 as it provides very strong understanding about this topic. Students should go through the answers provided for the MCQs after they have themselves solved the questions. All MCQs have been provided with four options for the students to solve. These questions are really useful for benefit of class 10 students. Please go through these and let us know if you have any feedback in the comments section.