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mcq on Properties of Acids and Bases. We covered all the mcq on Properties of Acids and Bases in this post for free so that you can practice well for the exam.
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mcq on Properties of Acids and Bases for Students
Which potassium compound is commonly given as a mineral supplement to correct or prevent potassium deficiency in the blood?
a) Potassium chloride
b) Potassium iodide
c) Potassium citrate
d) Potassium nitrate
Option a – Potassium chloride
The process in which an Acid reacts with a Base is termed
a) Condensation reaction
b) Sub-alteration reaction
c) Neutralisation reaction
d) Oxidation reaction
Option c – Neutralisation reaction
Which Organic Acid is naturally abundant in tomatoes?
a) Carbonic Acid
b) Acetic Acid
c) Oxalic Acid
d) Tartaric Acid
Option c – Oxalic Acid
Which substance acts as an antacid to reduce excess stomach Acid?
a) Iodoform
b) Morphine
c) Chlorine
d) Magnesium hydroxide
Option d – Magnesium hydroxide
A litmus solution that is neither acidic nor alkaline appears
a) Green
b) Red
c) Purple
d) Blue
Option c – Purple
Which Acid is chiefly responsible for the acidic nature of vinegar?
a) Tartaric Acid
b) Citric acid
c) Acetic acid
d) Linoleic acid
Option c – Acetic acid
Identify the correct statement(s): I. Salts formed from a strong acid and a weak Base have a pH below 7. II. Passing Electricity through brine results in the formation of sodium oxide.
a) Both I and II
b) Neither I nor II
c) Only I
d) Only II
Option c – Only I
Which Base is present in lime water?
a) Calcium hydroxide
b) Potassium hydroxide
c) Ammonium hydroxide
d) Magnesium hydroxide
Option a – Calcium hydroxide
Which of these substances is not an ingredient in the manufacture of baking soda?
a) H₂
b) Na₂CO₃
c) NH₃
d) NaCl
Option b – Na₂CO₃
Choose the synthetic indicator from the options below.
a) Turmeric
b) Litmus solution
c) Methyl orange
d) Cabbage juice
Option c – Methyl orange
When carbon dioxide dissolves in a water body, which acid forms and lowers the pH?
a) Carbonic acid
b) Carbolic acid
c) Carboxylic acid
d) Carbamic acid
Option a – Carbonic acid
Which acid occurs naturally in citrus fruits like oranges and lemons?
a) Citric acid
b) Tartaric acid
c) Acetic acid
d) Lactic acid
Option a – Citric acid
Which white crystalline polyatomic compound is used in fire extinguishers and for neutralising Acids and Bases?
a) Sodium Thiosulphate
b) Sodium Chromate
c) Sodium Bicarbonate
d) Sodium Bisulphite
Option c – Sodium Bicarbonate
During the reaction of dilute H₂SO₄ with magnesium, which gas is liberated?
a) O₂
b) SO₂
c) SO₃
d) H₂
Option d – H₂
Which of these compounds shows the greatest acidity?
a) CH₃COOH
b) C₂H₅COOH
c) C₆H₅COOH
d) HCOOH
Option d – HCOOH
Which acid is commonly used to impart a sour taste in vinegar, pickled vegetables, and sauces, and as a seasoning ingredient?
a) Acetic acid
b) Formic acid
c) Citric acid
d) Tartaric acid
Option a – Acetic acid
Select the correct sequence of basic strength.
a) KOH > CsOH > NaOH > LiOH
b) LiOH > NaOH > KOH > CsOH
c) LiOH > KOH > CsOH > NaOH
d) CsOH > KOH > NaOH > LiOH
Option d – CsOH > KOH > NaOH > LiOH
Bases that can dissolve in water are known as
a) Alkalis
b) Alkanes
c) Acids
d) Alkenes
Option a – Alkalis
Which combination of ingredients is mainly used in the production of glass?
a) Silica, sodium carbonate, borax, alumina, and cullets
b) Iron oxide, lead, sodium bicarbonate, alumina, and cullets
c) Magnesium carbonate, alumina, silica, and cullets
d) Iron oxide, sodium, alumina, silica, and cullets
Option a – Silica, sodium carbonate, borax, alumina, and cullets
Which of these functions as an olfactory indicator?
a) Litmus
b) Methyl orange
c) Phenolphthalein
d) Onion
Option d – Onion
Which compound serves as the active ingredient in soda–acid fire extinguishers?
a) Sodium chloride
b) Sodium hydrogen carbonate
c) Calcium hydroxide
d) Acetic acid
Option b – Sodium hydrogen carbonate
Which sodium-based chemical is used for softening hard water?
a) Na₂CO₃
b) NaOH
c) NaHCO₃
d) Na₂SO₄
Option a – Na₂CO₃
Regarding a universal indicator, consider the following: 1. It contains a blend of several indicators. 2. It displays varying colours at different hydrogen-ion concentrations. 3. It helps determine the strength of Acids and Bases during titration. Choose the correct option.
a) 1 and 2 only
b) 1 only
c) 2 and 3 only
d) 1, 2 and 3
Option d – 1, 2 and 3
Which acid in nettle leaves is responsible for the stinging sensation?
a) Methanoic acid
b) Citric acid
c) Tartaric acid
d) Acetic acid
Option a – Methanoic acid
Identify the correct statements about Bases and alkalis: 1. Every Base is an alkali. 2. All alkalis dissolve in water. 3. Alkalis are slippery, bitter, and corrosive.
a) 1 only
b) 1 and 3 only
c) 2 and 3 only
d) 3 only
Option c – 2 and 3 only
Which organism provides the natural source of litmus dye?
a) Protozoa
b) Virus
c) Lichen
d) Saccharomyces
Option c – Lichen
Milk of Magnesia, a remedy for indigestion, is classified as a
a) Strong Base
b) Mild Base
c) Strong acid
d) Mild acid
Option b – Mild Base
When diluting concentrated nitric acid, which statements are accurate? 1. The concentration of H₃O⁺ ions per unit volume increases. 2. Water should be added slowly to the concentrated acid. 3. Acid should be added slowly to water.
a) 1, 2 and 3
b) 1 and 2 only
c) 3 only
d) 2 and 3 only
Option c – 3 only
Choose the correct pH sequence for these substances: Coffee, Lemon juice, Milk of Magnesia, Blood.
a) Milk of Magnesia < Blood < Coffee < Lemon juice
b) Lemon juice < Blood < Coffee < Milk of Magnesia
c) Lemon juice < Coffee < Blood < Milk of Magnesia
d) Coffee < Lemon juice < Milk of Magnesia < Blood
Option c – Lemon juice < Coffee < Blood < Milk of Magnesia
Which statement about Acids is incorrect?
a) Hydrochloric acid is a component of stomach gastric juice.
b) Acetic acid is the main ingredient in vinegar.
c) Oxalic acid is present in tamarind paste.
d) Lemon juice has citric acid and orange juice contains ascorbic acid.
Option c – Oxalic acid is present in tamarind paste.
Which chemical is typically used to bleach paper?
a) Chloride
b) Chlorobenzene
c) Ammonium chloride
d) Hydrochloric acid
Option a – Chloride
Electrolysis of brine yields
a) NaCl
b) NaOH
c) KCl
d) KOH
Option b – NaOH
Which substance is found in antacid medicines to reduce stomach acidity?
a) Sodium hydroxide
b) Potassium hydroxide
c) Aluminium hydroxide
d) Lithium hydroxide
Option c – Aluminium hydroxide
What is the chemical formula of washing soda?
a) NaHCO₃
b) Na₂CO₃
c) Na₂CO₃·10H₂O
d) NaOCl
Option c – Na₂CO₃·10H₂O
Common Salt (NaCl) is not used as a starting material for making which of these products?
a) Bleaching powder
b) Baking soda
c) Plaster of Paris
d) Washing soda
Option c – Plaster of Paris
The pH value of Milk of Magnesia is approximately
a) 0
b) 7
c) 10
d) 14
Option c – 10
What is the natural appearance of hydrogen gas?
a) Pale yellow
b) Orange
c) Black
d) No colour
Option d – No colour
Which of these Salts is free from water of crystallization?
a) Potassium permanganate
b) Blue vitriol
c) Washing soda
d) Mohr’s Salt
Option a – Potassium permanganate
Which option is unsuitable for storing curd?
a) Stainless steel container
b) Copper container
c) Plastic container
d) Glass container
Option b – Copper container
Toothpaste protects teeth primarily by
a) Neutralizing extra acidity
b) Acting through emulsification
c) The presence of fluoride
d) Forming a calcium layer on teeth
Option a – Neutralizing extra acidity
Copper sulphate crystals are blue but turn white when heated because of
a) Oxygen
b) Nitrogen
c) Water content
d) Hydrogen
Option c – Water content
The human body maintains proper function within which pH range?
a) 6.8 – 7.2
b) 7.0 – 7.8
c) 6.5 – 7.5
d) 7.5 – 8.0
Option b – 7.0 – 7.8
Which substance is referred to as “Milk of Magnesia”?
a) Magnesium bicarbonate
b) Magnesium carbonate
c) Magnesium sulphate
d) Magnesium hydroxide
Option d – Magnesium hydroxide
Identify the correct elemental composition of borax.
a) Sodium, Boron, Magnesium, and Hydrogen
b) Sodium, Boron, Oxygen, and Hydrogen
c) Potassium, Boron, Oxygen, and Hydrogen
d) Sodium, Boron, Nitrogen, and Hydrogen
Option b – Sodium, Boron, Oxygen, and Hydrogen
Which of these naturally contains tartaric acid?
a) Lemon juice
b) Orange juice
c) Vinegar
d) Tamarind paste
Option d – Tamarind paste
The colour of anhydrous copper(II) sulphate is
a) White
b) Blue
c) Green
d) Yellow
Option a – White
What is the chemical formula of hypobromous acid?
a) HBrO₂
b) HBrO
c) HBr
d) HBrO₃
Option b – HBrO
Which statement about pH is incorrect?
a) The pH scale indicates the hydrogen ion concentration of a solution.
b) A higher hydrogen ion concentration results in a higher pH value.
c) pH is typically measured on a scale from 0 to 14.
d) The “p” in pH represents potenz, a German word meaning “power.
Option b – A higher hydrogen ion concentration results in a higher pH value.
Which Food item has a pH between 2 and 3, making it strongly acidic?
a) Lemon juice
b) Apple juice
c) Tomato juice
d) Blackberry juice
Option a – Lemon juice
What is the chemical formula of baking soda?
a) NaOH
b) Na₂CO₃·10H₂O
c) NaHCO₃
d) CaOCl₂
Option c – NaHCO₃
Which common white kitchen powder releases carbon dioxide when mixed with an acid?
a) Sodium bicarbonate
b) Sodium fluoride
c) Sodium phosphate
d) Sodium nitrate
Option a – Sodium bicarbonate
Which sulphur-based preservative is used to extend the shelf life of meats like sausages and burgers?
a) Sodium metabisulphite
b) Sodium polysulfides
c) Sodium thiosulfate
d) Sodium phenyl sulfide
Option a – Sodium metabisulphite
The pH of curd is
a) Higher than 7
b) Close to 7
c) Higher than that of milk
d) Lower than that of milk
Option d – Lower than that of milk
The reaction between an acid and a metal produces
a) Hydrogen gas and a Salt
b) Carbon dioxide, Salt, and water
c) Salt and water
d) Carbon dioxide, Salt, and hydrogen gas
Option a – Hydrogen gas and a Salt
Milk of Magnesia is a suspension of
a) Magnesium oxalate
b) Magnesium chlorate
c) Magnesium bromide
d) Magnesium hydroxide
Option d – Magnesium hydroxide
Which of the following statements is correct?
a) Living Organisms can tolerate a wide pH range.
b) Rainwater with a pH below 8.2 is termed acid rain.
c) The human body functions in a pH range of 7.0 to 7.8.
d) Tooth decay begins when the mouth’s pH drops below 1.5.
Option c – The human body functions in a pH range of 7.0 to 7.8.
Which of these acts as a natural acid–Base indicator?
a) Turmeric only
b) Litmus only
c) Both turmeric and litmus
d) Neither turmeric nor litmus
Option c – Both turmeric and litmus
Which pair is incorrectly matched?
a) Tomato – Formic acid
b) Orange – Citric acid
c) Grapes – Tartaric acid
d) Rancid butter – Butyric acid
Option a – Tomato – Formic acid
Which acid is naturally present in spinach?
a) Formic acid
b) Lactic acid
c) Oxalic acid
d) Citric acid
Option c – Oxalic acid
Which natural source–acid pair is NOT correct?
a) Tamarind – Oxalic acid
b) Vinegar – Acetic acid
c) Curd – Lactic acid
d) Orange – Citric acid
Option a – Tamarind – Oxalic acid
Tooth decay starts when the mouth’s pH falls below
a) 5.5
b) 7.5
c) 9.5
d) 10.5
Option a – 5.5
What happens when an acid or a Base is diluted with water? ( mcq on Properties of Acids and Bases )
a) Decrease in ion concentration (H₃O⁺/OH⁻) per unit volume
b) Decrease in ion concentration (H₃O⁺/OH⁻) per litre
c) Increase in ion concentration (H₃O⁺/OH⁻) per unit volume
d) Decrease in ion concentration (H₃O⁺/OH⁻) per unit volume
Option d – Decrease in ion concentration (H₃O⁺/OH⁻) per unit volume
Litmus paper turns which colour in soapy water? ( mcq on Properties of Acids and Bases )
a) Blue
b) Red
c) Yellow
d) Orange
Option a – Blue
An ant bite injects formic acid. What should be applied to neutralise it? ( mcq on Properties of Acids and Bases )
a) Lime juice
b) Tomato pulp
c) Moist baking soda
d) Bleaching powder
Option c – Moist baking soda
A 100 mL solution contains 0.01 moles of NaOH. What is its pH? ( mcq on Properties of Acids and Bases )
a) 13
b) 1
c) 10
d) 2
Option a – 13
When a milkman adds a little baking soda to milk, the milk becomes ( mcq on Properties of Acids and Bases )
a) Weakly alkaline
b) Strongly alkaline
c) Weakly acidic
d) Strongly acidic
Option a – Weakly alkaline
When baking soda is used in bread, what makes it soft and spongy? ( mcq on Properties of Acids and Bases )
a) Sodium Salt of an acid
b) NaHCO₃
c) Carbon dioxide
d) Water
Option c – Carbon dioxide
Borax is obtained from ( mcq on Properties of Acids and Bases )
a) Calcium carbonate
b) Magnesium carbonate
c) Potassium carbonate
d) Sodium carbonate
Option d – Sodium carbonate
Which gas is released when zinc reacts with dilute sulphuric acid? ( MCQ on Properties of Acids and Bases )
a) Argon
b) Helium
c) Hydrogen
d) Nitrogen
Option c – Hydrogen
Brine is an aqueous solution of which Salt? ( MCQ on Properties of Acids and Bases )
a) Sodium chloride
b) Potassium chloride
c) Calcium chloride
d) Sodium nitrate
Option a – Sodium chloride
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