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MCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts with Answers

Students can practice the NCERT MCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts with Answers Pdf free download is available here. Revise all the concepts easily by taking help from the MCQ Questions for Class 10 Science with Answers are prepared based on the latest exam pattern. Students can refer to these Acids, Bases and Salts Class 10 MCQs Questions with Answers and assess their preparation level.

Acids, Bases and Salts Class 10 MCQs Questions with Answers

Question 1.
A strong acid or base :
(a) is stable in solution
(b) has a higher molecular weight
(c) has a high boiling point
(d) ionises completely in solution.
Answer:
(d) ionises completely in solution.

Question 2.
In the process of neutralization :
(a) an acid is formed
(b) an alkali is formed
(c) a salt is formed
(d) salt and water are formed
Answer:
(d) salt and water are formed

Question 3.
Basicity of an acid depends upon :
(a) replaceable OH atoms
(b) replaceable H atoms
(c) replaceable O atoms
(d) none of these
Answer:
(b) replaceable H atoms

Question 4.
A substance has a tendency to give proton H+ in aqueous solution. This substance is :
(a) acid
(b) base
(c) alkali
(d) salt
Answer:
(a) acid

Question 5.
Strength of an acid and base depends on :
(a) molecular weight
(b) equivalent weight
(c) degree of ionization
(d) boiling point
Answer:
(c) degree of ionization

Question 6.
pH of an aqueous solution is 4. Hydrogen ion concentration mol/litre of this solution is :
(a) 4
(b) 1.0 × 10-4
(c) 10.
(d) 1.0 × 104
Answer:
(d) 1.0 × 104

Question 7.
An aqueous solution of HCl with 108 mol/litre has pH value :
(a) less than 7
(b) 7
(c) 8
(d) 14
Answer:
(c) 8

Question 8.
In alkaline solution colour of methyl orange will be :
(a) red
(b) yellow
(c) blue
(d) colourless
Answer:
(b) yellow

Question 9.
In acidic medium colour of phenolphthalein will be:
(a) pink
(b) yellow
(c) blue
(d) colourless
Answer:
(d) colourless

Question 10.
The chemical name and formula of baking powder are:
(a) sodium chloride (NaCl)
(b) sodium bicarbonate (NaHCO3)
(c) sodium carbonate (Na2CO3)
(d) sodium sulphate (Na2SO4)
Answer:
(b) sodium bicarbonate (NaHCO3)

Question 11.
The formula of washing soda is :
(a) CaCO3
(b) Na2CO3.10H2O
(c) NaOH
(d) Na2.SO4
Answer:
(b) Na2CO3.10H2O

Question 12.
The Chemical used for white-washing is :
(a) Cao
(b) CaCO3
(c) CaOcl2
(d) CaCl2
Answer:
(a) Cao

Question 13.
What is used in fire extinguishers?
(a) NaHCO3
(b) HCl
(c) NaCl
(d) Cacl2
Answer:
(a) NaHCO3

Question 14.
What is used as a disinfectant in drinking water:
(a) CaOCl2
(b) CaCl2
(c) CaCO3
(d) CaSO4
Answer:
(a) CaOCl2

Question 15.
A solution turns red litmus blue, its pH is likely to be:
(a) 1
(b) 4
(c) 5
(d) 10
Answer:
(d) 10

Question 16.
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
Answer:
(b) HCl

Question 17.
The number of acidic hydrogen atoms in sulphuric acid is:
(a) 2
(b) 1
(c) 3
(d) Zero
Answer:
(a) 2

Question 18.
Which one of the following types of medicine is used for treating indigestion?
(a) Antibiotic
(b) Analgesic
(c) Antacid
(d) Antiseptic
Answer:
(b) Analgesic

Question 19.
Acetic acid is a weak acid because :
(a) quantity of water is greater
(b) its ionisation is small
(c) it is an organic acid
(d) it is an inorganic acid
Answer:
(c) it is an organic acid

Question 20.
pH value of pure water is :
(a) 0
(b) 1
(c) 7
(d) 14.
Answer:
(c) 7

Question 21.
The strength of hydrochloric acid is 10-2 N. pH value of this solution is :
(a) 1
(b) 2
(c) 3
(d) 0.
Answer:
(b) 2

Question 22.
When pH of rain water goes below 5.6, it is called :
(a) acid rain
(b) base rain
(c) neutral rain
(d) Either (a) or (b)
Answer:
(a) acid rain

Question 23.
The burning sensation on touching nettle leaves is due to:
(a) formic acid.
(b) methanoic acid
(c) ethanoic acid
(d) propanoic acid.
Answer:
(b) methanoic acid

Question 24.
The combination of hydrochloric acid and sodium hydroxide solution forms:
(a) common salt
(b) caustic soda
(c) bleaching powder
(d) baking soda
Answer:
(a) common salt

Question 25.
The chemical name of caustic soda is :
(a) sodium hydroxide
(b) sodium chloride
(c) sodium bicarbonate
(d) calcium sulphate.
Answer:
(a) sodium hydroxide

Question 26.
The pH value of a solution is 3. The solution is :
(a) Basic
(b) Neutral
(c) ACidic
(d) None of them
Answer:
(c) acidic

Question 27.
pH of an acidic solution is :
(a) Less than 7
(b) 7
(c) more than 7
(d) Zero.
Answer:
(a) Less than 7

Question 28.
The possible pH value of acidic rain water is :
(a) 5.2
(b) 6.2
(c) 7.2
(d) 8.2
Answer:
(a) 5.2

Question 29.
The colour of furmeric with alkali :
(a) is yellow
(b) is orange
(c) is brownish red
(d) remains unchanged.
Answer:
(c) is brownish red

Question 30.
Baking powder releases which gas on heating ?
(a) CO
(b) Na2CO3
(c) CO2
(d) O2
Answer:
(c) CO2

Question 31.
The aqueous solution of sulphur dioxide is :
(a) acidic
(b) Basic
(c) Neutral
(d) Amphoteric
Answer:
(a) acidic

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