Acid Bases and Salts Class 10 MCQ Online Test

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Mock Test on Acids Bases and Salts for Class 10 Students

The buildup of which acid in our muscles during sudden activity causes cramps?

(a) Lactic acid

(b) Pyruvic acid

(c) Carbonic acid

(d) Oxalic acid

Option a – Lactic acid

Farmers are requested to mix lime with soil while farming their fields. This is because

(a) lime is very helpful in maintaining the water content in the soil.

(b) lime decreases the acidity of the soil.

(c) lime decreases the basicity of soil.

(d) A high concentration of lime is necessary for plant growth.

Option b – lime decreases the acidity of the soil

Which acid is present in acid rain? ( Acid Bases MCQ )

(a) Benzoic acid

(b) Acetic acid

(c) Nitric acid

(d) Oxalic acid

Option c – Nitric acid

The acid in gastric juice is

(a) Acetic acid

(b) Nitric acid

(c) Hydrochloric acid

(d) Sulphuric acid

Option c – Hydrochloric acid

When we cut an onion, the synthase enzyme converts the amino acid sulfoxide of the onion into which acid? ( Acid Bases MCQ )

(a) Citric acid

(b) Nitric acid

(c) Sulphuric acid

(d) Sulfenic acid

Option d – Sulfenic acid

Which of the following is the major component of vinegar?

(a) Citric acid

(b) Lactic acid

(c) Nitric acid

(d) Acetic acid

Option d – Acetic acid

Assertion (A) To dilute sulphuric acid, acid is added to water and not water to acid. Reason (R) Specific heat of water is very high. Codes ( Acid Bases MCQ )

(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

Option a – Both A and R are true and R is the correct explanation of A

Which of the following gases in the atmosphere is/are responsible for acid rain? I. Oxides of sulfur II. Oxides of nitrogen III. Oxides of carbon Select the correct answer using the codes given below.

(a) I and II

(b) I and Ill

(c) Only II

(d) I, II, and Ill

Option a – I and II

A base is a substance that ( Acid Bases MCQ )

(a) is bitter in tests.

(b) gives OH ions in an aqueous solution.

(c) can donate electrons.

(d) All of the above

Option d – All of the above

Select the incorrect statement regarding the potash alum.

(a) It has 24 water molecules.

(b) It swells on heating.

(c) Its aqueous solution is basic.

(d) It is white in color.

Option c – Its aqueous solution is basic

What is the chemical name of the deadly poison ‘cyanide’? ( Acid Bases MCQ )

(a) Sulphuric acid

(b) Hydrochloric acid

(c) Nitric acid

(d) Prussic acid

Option d – Prussic acid

Which among the following acid is also known as ‘Muriatic acid’?

(a) Hydrochloric acid

(b) Sulphuric acid

(c) Carbonic acid

(d) Nitric acid

Option a – Hydrochloric acid

‘Oil of Vitriol’ is the common name of which of the following? ( Acid Bases MCQ )

(a) Nitric acid

(b) Carbonic acid

(c) Acetic acid

(d) Sulphuric acid

Option d – Sulphuric acid

Citric acid is present in free form in

(a) Tamarind

(b) Milk

(c) Apple

(d) Lemon

Option d – Lemon

Food preservatives prevent spoilage of food due to microbial growth. Which of the following acid is used as a preservative of food items? ( Acid Bases MCQ )

(a) Oxalic acid

(b) Sulphuric acid

(c) Carboxylic acid

(d) Benzoic acid

Option d – Benzoic acid

Acid turns blue litmus red and base turns red litmus blue. A student tested a liquid with red litmus paper which remained red with no change. This shows that liquid

(a) is not a base.

(b) is not an acid.

(c) is neither an acid nor a base.

(d) must be pure water or acid.

Option d – must be pure water or acid

The Soda-acid fire extinguisher contains ( Acid Bases MCQ )

(a) sulphuric acid and a solution of sodium hydrogen carbonate.

(b) nitric acid and solution of sodium hydrogen carbonate.

(c) sulphuric acid and solution of sodium carbonate.

(d) sulphuric acid and solution of potassium carbonate.

Option a – sulphuric acid and a solution of sodium hydrogen carbonate

Which one of the following will not produce carbon dioxide on reacting with an aqueous solution of hydrochloric acid?

(a) Limestone

(b) Quicklime

(c) Chalk

(d) Marble

Option b – Quicklime

Which one of the following was the first mineral acid discovered? ( Acid Bases MCQ )

(a) Sulphuric acid

(b) Hydrochloric acid

(c) Nitric acid

(d) Phosphoric acid

Option a – Sulphuric acid

An acid is a substance which I. is sour in taste. II. turns red litmus paper into the blue.

(a) Only I is correct

(b) Only Il is correct

(c) Both I and II

(d) None of these is correct

Option a – Only I is correct

Which one of the following is an organic acid? ( Acid Bases MCQ )

(a) Hydrochloric acid

(b) Nitric acid

(c) Acetic acid

(d) Sulphuric acid

Option c – Acetic acid

Which is not a Lewis acid?

(a) AICI3

(b) BF3

(c) NH3

(d) FeCl3

Option c – NH3

Sodawater obtained by passing carbon dioxide in water is ( Acid Bases and Salts Class 10 MCQ Online Test )

(a) an oxidizing agent

(b) basic in nature

(c) acidic in nature

(d) a reducing agent

Option c – acidic in nature

Which one of the following does not contain the COOH group?

(a) Citric acid

(b) Lactic acid

(c) Tartaric acid

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(d) Ascorbic acid

Option d – Ascorbic acid

The carboxylic acid group can be detected by ( Acid Bases and Salts Class 10 MCQ Online Test )

(a) sodium bisulphite test

(b) Fehling’s solution test

(c) Tollen’s reagent

(d) NaHCO3

Option d – NaHCO3

Which of the following are correctly matched? 1. Plants and animals – pH range is 7.0 to 7.8 2. Rainwater – pH is 7.6 3. Tooth decay – pH less than 5.5 ( Acid Bases MCQ )

(a) 1 and 2


(b) 2 and 3


(c) 1 and 3


(d) 1, 2 and 3

Option c – 1 and 3

Which of the following are correctly matched? 1. Common salt – formed by sodium hydroxide and hydrochloric acid. 2. Brine – aqueous solution of sodium chloride 3. Chlor-alkali process – formation of sodium chloride

(a) 1 and 2


(b) 2 and 3


(c) 1 and 3


(d) 1, 2 and 3

Option a – 1 and 2

Which of the following are correctly matched? 1. Bleaching powder – chemical industries 2. Baking powder – hydrogen carbonate and a mild edible acid 3. Washing soda – hardness of water

(a) I and 2


(b) 2 and 3


(c) 1 and 3


(d) 1, 2 and 3

Option d – 1, 2 and 3

Which of the following are correctly matched? 1. Acid + salt – metal + hydrogen 2. Acid + metal carbonate – salt + carbon dioxide + water 3. Metal oxide + acid – salt + water

(a) 1 and 2


(b) 2 and 3


(c) 1 and 3


(d) 1, 2 and 3

Option b – 2 and 3

Which of the following is/are correct for diluting acid? 1. Adding acid to water by stirring. 2. Adding water to acid by stirring.

(a) Only 1


(b) Only 2


(c) Both 1 and 2


(d) Neither 1 nor 2

Option a – Only 1

Which of the following is/are correct for pH? 1. A scale for measuring hydronium ion concentration. 2. Values less than 7 on the pH scale represent an acidic solution. 3. As the pH value increases from 7 to 14, it represents an increase in hydrogen ion concentration in the solution.

(a) Only 1


(b) Only 2


(c) Only 3


(d) 1, 2 and 3

Option b – Only 2

Which of the following statements is/are correct for litmus? 1. Litmus solution is a purple dye. 2. It is extracted from lichen. 3. In a neutral solution, it remains colorless.

(a) 1 and 2


(b) 2 and 3


(c) 1 and 3


(d) 1, 2 and 3

Option a – 1 and 2

Which of the following is/are correct for olfactory indicators? 1. Their color changes with acid or base. 2. Onion, vanilla, or clove are examples.

(a) Only 1


(b) Only 2


(c) Both 1 and 2


(d) Neither 1 nor 2

Option b – Only 2

Sodium hydroxide is used

(a) as an antacid

(b) in the manufacture of soap

(c) as a cleansing agent

(d) in alkaline batteries

Option b – in the manufacture of soap

Sodium hydroxide turns phenolphthalein solution

(a) pink

(b) yellow

(c) colourless

(d) orange

Option a – pink

The chemical formula of washing soda is

(a) Na₂CO3 7H₂O

(b) Na2 CO3 5H₂O

(c) Na₂CO3 2H₂O

(d) Na₂CO3 10H₂O

Option d – Na₂CO3 10H₂O

How many water molecules does hydrated calcium sulphate contain?

(a) 5

(b) 10

(c) 7

(d) 2

Option d – 2

Sodium carbonate is a basic salt because it is a salt of an

(a) strong acid and strong base

(b) weak acid and weak base

(c) strong acid and weak base

(d) weak acid and strong base

Option d – weak acid and strong base

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

Option d – bases, which are soluble in water

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)

Option d – (ii) and (iv)

The apparatus given in the adjoining figure was set up to demonstrate electrical conductivity. Which of the following statement(s) is (are) correct? (i) Bulb will not glow because the electrolyte is not acidic. (ii) Bulb will glow because HCl is a strong acid and furnishes ions for conduction. (iii) Bulb will not glow because the 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

Option c – (ii) only

Lime water reacts with chlorine to give

(a) bleaching powder

(b) baking powder

(c) baking soda

(d) washing soda

Option c – baking soda

Nettle sting is a natural source of which acid?

(a) MetiWanoic acid

(b) Lactic acid

(c) Citric acid

(d) Tartaric acid

Option a – MetiWanoic acid

Tooth enamel is made up of

(a) calcium phosphate

(b) calcium carbonate

(c) calcium oxide

(d) potassium

Option a – calcium phosphate

What is the pH range of our body?

(a) 7.0 – 7.8

(b) 7.2 – 8.0

(c) 7.0 – 8.4

(d) 7.2 – 8.4

Option a – 7.0 – 7.8

Rain is called acid rain when its :

(a) pH falls below 7

(b) pH falls below 6

(c) pH falls below 5.6

(d) pH is above 7

Option c – pH falls below 5.6

Sodium hydroxide is a

(a) weak base

(b) weak acid

(c) strong base

(d) strong acid

Option c – strong base

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

Option d – Hydrochloric acid

When copper oxide and dilute hydrochloric acid react, colour changes to

(a) white

(b) bluish-green

(c) blue-black

(d) black

Option b – bluish-green

At what temperature is gypsum heated to form Plaster of Paris?

(a) 90°C

(b) 100°C

(c) 110°C

(d) 120°C

Option b – 100°C

Na2CO3 10H₂O is

(a) washing soda

(b) baking soda

(c) bleaching powder

(d) tartaric acid

Option a – washing soda

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

Option c – Dissociation

A solution reacts with crushed eggshells to give a gas that turns lime-water milky. The solution contains

(a) NaCl

(b) HCl

(c) LiCl

(d) KCl

Option b – HCl

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.

Option d – by heating gypsum to 373 K

Bleaching powder gives the smell of chlorine because it

(a) is unstable

(b) gives chlorine on exposure to the atmosphere

(c) is a mixture of chlorine and slaked lime

(d) contains excess chlorine

Option b – gives chlorine on exposure to the atmosphere

Which of the following acid does not react with metals?

(a) sulphuric acid

(b) phosphoric acid

(c) carbonic acid

(d) nitric acid

Option c – carbonic acid

Which of the following is known as milk of lime?

(a) Calcium hydroxide

(b) Magnesium hydroxide

(c) Potassium hydroxide

(d) Ammonium hydroxide

Option a – Calcium hydroxide

…….. is known as oil of vitriol.

(a) Sulphuric acid

(b) Nitric acid

(c) Hydrochloric acid

(d) Acetic acid

Option a – Sulphuric acid

Bleaching powder is soluble in cold water giving a milky solution due to

(a) available chlorine

(b) lime present in it

(c) calcium carbonate formation

(d) the absorption of carbon dioxide from the atmosphere

Option b – lime present in it

The pH is less than 7 of the solution of

(a) FeCl3

(b) NaCN

(c) NaOH

(d) NaCl

Option a – FeCl3

If the pH of A, B, C and D are 9.5,2.5, 3.5 and 5.5 respectively, then the strongest acid is

(a) A

(b) C

(c) D

(d) B

Option d – B

The pH of gastric juice that is released during digestion is

(a) more than 7

(b) 7

(c) less than 7

(d) can’t be predicted

Option c – less than 7

Acids and bases are important because of

(a) their use in the industry

(b) their effects on human health

(c) their effect on farmer’s crop

(d) All the above are correct.

Option d – All the above are correct

A salt derived from a strong acid and weak base will dissolve in water to give a solution which is

(a) acidic

(b) basic

(c) neutral

(d) None of these

Option a – acidic

Plaster of Paris is made from

(a) limestone

(b) slaked lime

(c) quick lime

(d) gypsum

Option d – gypsum

In the reaction between hydrogen sulphate ion and water, the water acts as

(a) an acid

(b) a base

(c) a salt

(d) an inert medium

Option b – a base

Stung by hairs of nettle leaves causes burning pain. This is due to the injection of

(a) Acetic acid

(b) Methanoic acid

(c) Sulphuric acid

(d) Hydrochloric acid

Option b – Methanoic acid

The chemical formula of baking soda is

(a) Na₂CO3

(b) NaHCO3

(c) CaCO3

(d) NaOH

Option b – NaHCO3

Which compound, when dissolved in water, conducts electricity and forms a basic solution?

(a) HCI

(b) CH₂COOH

(c) CH3OH

(d) NaOH

Option d – NaOH

The principal use of hydrofluoric acid is

(a) in etching glass

(b) as a bleaching agent

(c) as an extremely strong oxidizing agent

(d) in the preparation of strong organic fluorine compounds

Option a – in etching glass

The desirable range of pH for drinking water is

(a) 6.5 to 8.5

(b) 5.0 to 6.5

(c) 6.5 to 7.0

(d) 7.0 to 8.5

Option c – 6.5 to 7.0

Brine is an aqueous solution of

(a) NaCl

(b) NaOH

(c) NaHCO3

(d) Na₂CO3

Option a – NaCl

The pH value of a sample of multiple-distilled water is

(a) zero

(b) 14

(c) very near zero

(d) very near seven

Option d – very near seven

HCl gas changes the colour of

(a) dry litmus paper

(b) wet litmus paper

(c) Both dry and wet litmus paper

(d) None of the above is correct

Option b – wet litmus paper

Which of the following is an alkali?

(a) Ca(OH)₂

(b) KOH

(c) Mg(OH)₂

(d) CaCO3

Option b – KOH

The poisonous effect of acid present in stings of bees and ants can be neutralised by the use of a solution that contains

(a) acetic acid

(b) formic acid

(c) sodium hydroxide

(d) sodium chloride.

Option c – sodium hydroxide

When the stopper of a bottle containing colourless liquid was removed, the bottle gave a smell like that of vinegar. The liquid in the bottle could be

(a) hydrochloric acid

(b) sodium hydroxide solution

(c) acetic acid solution

(d) saturated sodium hydrogen carbonate solution

Option c – acetic acid solution

The colour of pH paper when put in distilled water changed to green. Now some common salt is added to water and pH paper is tested in this solution. The colour of pH paper in this case is likely to be

(a) green

(b) yellow

(c) red

(d) blue

Option a – green

A drop of the liquid sample was put on pH paper. The colour of the pH paper turned blue. The liquid sample could be

(a) lemon juice

(b) hydrochloric acid

(c) sodium hydrogen carbonate

(d) ethanoic acid.

Option c – sodium hydrogen carbonate

Which of the following is not required to find the pH of a given sample?

(a) pH paper

(b) Litmus paper

(c) Universal indicator

(d) Standard pH chart

Option b – Litmus paper

Universal indicator solution is named as such because

(a) it is available universally

(b) it has a universal appearance

(c) it can be used for the entire pH range

(d) All the above are correct

Option c – it can be used for the entire pH range

Chalk and marble are different forms of

(a) Calcium hydrogen carbonate

(b) Calcium carbonate

(c) Calcium acetate

(d) Sodium carbonate

Option b – Calcium carbonate

Ammonium hydroxide is a weak base because

(a) it has a low vapour pressure

(b) it is only slightly ionised

(c) it is not a hydroxide of any metal

(d) it has a low density

Option b – it is only slightly ionised

On passing excess carbon dioxide through lime water ( Acid Bases and Salts Class 10 MCQ )

(a) the milkiness of lime water increases

(b) there is no change in the milkiness of lime water

(c) the milkiness of lime water disappears

(d) None of the above is correct.

Option c – the milkiness of lime water disappears

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