Acid Base and Salt MCQ. We covered all the Acid Base and Salt MCQ in this post for free so that you can practice well for the exam.
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MCQ on Acid Base and Salt for Students
What is the Jeweller’s rouge?
(a) Ferric oxide
(b) Ferrous oxide
(c) Ferrous carbonate
(d) Ferric carbonate
Option a – Ferric oxide
Which one of the following is correct? The setting of the plaster of Paris is
(a) dehydration
(b) oxidation with atmospheric oxygen
(c) hydration leading to another hydrate
(d) combination with atmospheric CO2
Option c – hydration leading to another hydrate
Which one of the following is used as a mordant in the dyeing and tanning industry?
(a) Magnesium oxide
(b) Magnesium carbonate
(c) Magnesium chloride
(d) Magnesium sulphate
Option d – Magnesium sulphate
A woman desires to clean the surface of her gold ornaments with a chemical approach. For this, she requires to use
(a) aqua-regia
(b) concentrated H₂SO4
(c) concentrated NaOH
(d) sodium thiosulphate solution
Option a – aqua-regia
Sodium thiosulphate (Na₂S₂O3) solution is used in photography to
(a) remove reduced silver
(b) reduce silver bromide (AgBr) grain to silver
(c) remove undecomposed AgBr as a soluble silver thiosulphate complex
(d) convert the metallic silver to silver salt
Option c – remove undecomposed AgBr as a soluble silver thiosulphate complex
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
The tracking of people by trained dogs is based on the recognition of which of the following compounds in the sweat from feet?
(a) Carboxylic acids
(b) Uric acid
(c) Sugar
(d) Salt
Option a – Carboxylic acids
What is the main constituent of a pearl?
(a) Calcium carbonate and magnesium carbonate
(b) Calcium sulphate only
(c) Calcium oxide and calcium sulphate
(d) Calcium carbonate only
Option d – Calcium carbonate only
On the labels of the bottles, some soft drinks are claimed to be acidity regulators. They regulate acidity using
(a) carbon dioxide
(b) bicarbonate salts
(c) Both (a) and (b)
(d) carbon dioxide and lime
Option b – bicarbonate salts
Iodised salt is a
(a) a mixture of potassium iodide and common salt
(b) a mixture of molecular iodide and common salt
(c) a compound formed by the combination of potassium iodide and common salt
(d) a compound formed by molecular iodine and common salt
Option a – a compound formed by the combination of potassium iodide and common salt
Gypsum (CaSO4 2H2O) is added to the clinker during cement manufacturing to.
(a) decrease the rate of setting of cement
(b) bind the particles of calcium silicate
(c) facilitate the formation of colloidal gel
(d) impart strength to cement
Option a – decrease the rate of setting of cement
Which one among the following will you put into pure water in order to pass an electric current through it?
(a) Kerosene
(b) Mustard oil
(c) Lemon juice
(d) Sugar
Option c – Lemon juice
Which one of the following is a tribasic acid?
(a) Hydrochloric acid.
(b) Nitric acid
(c) Sulphuric acid
(d) Phosphoric acid
Option d – Phosphoric acid
The solution of which one of the following will have a pH of less than 7?
(a) NaOH
(b) KCI
(c) FeCl3
(d) NaCl
Option c – FeCl3
Which one of the following gases dissolves in water to give an acidic solution?
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) Hydrogen
Option a – Carbon dioxide
Which of the following is an alkali?
(a) Ca(OH)2
(b) KOH
(c) Mg(OH)2
(d) CaCO3
Option b – KOH
The Compound that gives a basic solution in HF is
(a) AsF5
(a) PF5
(c) BF3
(d) BrF3
Option d – BrF3
Which of the following salts are insoluble in water?
(a) Chlorides of Fe and Mn
(b) Nitrates of Ag and Pb
(c) Carbonates of Pb and Cu
(d) Phosphates of Na and NH4
Option c – Carbonates of Pb and Cu
Two elements gallium and oxygen combine to form a compound Ga₂O3. Which among the following is the valency of gallium?
(a) 1
(b) 2
(c) 3
(d) 4
Option c – 3
Which among the following statements with regard to pH scale is/are correct? I. It is a logarithmic scale. II. The scale is limited to 0-14 because the ionic product of water is about 10-14 III. The lower the value of pH, the greater the acidity of the solution. Select the correct answer using the code given below
(a) I and II only
(b) I, II and III
(c) I and III only
(d) II only
Option b – I, II and III
Neutral water with a pH of about 7 becomes slightly acidic when aerated. This is because
(a) oxygen from the air is dissolved in the water which makes the water acidic
(b) dirt, which gets contaminated with the water during aeration makes the water acidic
(c) ultraviolet radiation dissociates water molecules and makes the water acidic
(d) carbon dioxide from the air is dissolved
Option a – oxygen from the air is dissolved in the water which makes the water acidic
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