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

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Questions
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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