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Acids Bases and Salts MCQs | Acids Bases and Salts Multiple Choice Questions and Answers

(1) Which is known as carbolic acid?
[A] Phenol
[B] Ethanol
[C] Acetic acid
[D] Oxalic acid
Answer: Phenol
(2) Name an element which is common to all acids?
[A] Sulphur
[B] Chlorine
[C] Nitrogen
[D] Hydrogen
Answer: Hydrogen

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(3) On a pH scale, we can measure pH from
[A] 0-7
[B] 7-14
[C] 0-14
[D] None of the above
Answer: 0-14
(4) What happens when an acid reacts with metal oxide?
[A] Salt and water is formed
[B] Metal hydride is formed
[C] Oxyacid will be formed
[D] None of the above
Answer: Salt and water is formed
(5) Which statement is correct regarding acids? I. Acid is a molecule which donates a proton or accepts electron pair in reactions. II. Acid increases the concentration of hydrogen atoms or hydronium atoms in water. III. Acids have a pH value of less than 7. IV. The acid in the stomach helps in the digestion of food.
[A] Only I
[B] Both II and IV
[C] I, III and IV
[D] All the above
Answer: All the above
(6) Which of the following is a battery acid?
[A] Sulphuric acid diluted with water
[B] Carboxylic acid mixed with water
[C] Concentrated hydrochloric acid
[D] Concentrated sulphuric acid
Answer: Sulphuric acid diluted with water
(7) Red litmus paper turns into which colour in basic/alkaline conditions?
[A] Violet colour
[B] Red colour
[C] Blue colour
[D] No change
Answer: Blue colour
(8) Which acid is present in sour milk?
[A] Ascorbic acid
[B] Ethanoic acid
[C] Tartaric acid
[D] Lactic acid
Answer: Lactic acid
(9) Which of the following is present in Bee sting?
[A] Tartaric acid
[B] Methanoic acid
[C] Citric acid
[D] All of the above
Answer: Methanoic acid
(10) Which of the following is true about Alkalis?
[A] Bases which are soluble in water are called alkalis
[B] Bases which are soluble in acids are called alkalis
[C] Bases which are soluble in other bases are called alkalis
[D] Bases which are harsh to touch, sour in taste are called alkalis
Answer: Bases which are soluble in water are called alkalis
(11) NaCl (common salt) which we use in food is
[A] Neutral
[B] Acidic
[C] Basic
[D] All of the above
Answer: Neutral
(12) The chemical formula of Gypsum is
[A] CaSO4.2H2O
[B] CuSO4.5H2O
[C] CoCl4.6H2O
[D] SnCl2.2H2O
Answer: CaSO4.2H2O
(13) The water of crystallisation is the fixed number of
[A] water molecules present in one formula unit of a salt
[B] sodium molecules present in one mass unit of a salt
[C] water molecules present in one mass unit of a salt
[D] sodium molecules present in one formula unit of a salt
Answer: water molecules present in one formula unit of a salt
(14) Why is calcium sulphate hemihydrates called Plaster of Paris?
[A] Because it is found only in Paris
[B] Because of its colour which is quite similar to that of Paris
[C] Because of its large deposits in the Paris
[D] Because its first usage began in Paris
Answer: Because of its large deposits in the Paris
(15) Name the substance which on treatment with chlorine yields bleaching powder.
[A] Calcium hydroxide
[B] Calcium carbonate
[C] Calcium oxide
[D] Calcium chloride
Answer: Calcium hydroxide
(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: HCl
(17) Which one of the following types of medicines are used for treating indigestion?
[A] Antibiotic
[B] Analgesic
[C] Antacid
[D] Antiseptic
Answer: Antacid
(18) In the presence of normal acids, Phenolphthalein colour remains
[A] Pink
[B] Colourless
[C] Orange
[D] None of the above
Answer: Colourless
(19) Ant sting produces
[A] Acetic acid
[B] Methanoic acid
[C] Oxalic acid
[D] Butanoic acid
Answer: Methanoic acid
(20) Which of the following is acidic in nature?
[A] Lime juice
[B] Human blood
[C] Lime water
[D] Antacid
Answer: Lime juice

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