10-minute Quiz : Chapter 61

Which of the following is a test for chlorine?

• A. Holding a piece of moist red litmus paper in the gas
• B. Holding a piece of moist blue litmus paper in the gas
• C. Holding a piece of dry cobalt(II) chloride paper in the gas
• D. Holding a piece of filter paper soaked with bromine water

The diagram shows a set-up for the preparation of gas G. Which of the following materials can be used to test for gas G?

• A. Litmus solution
• B. Bromine water
• C. Burning splint
• D. Glowing splint

Which of the following is a test for hydrogen chloride?

• A. Bubbling the gas into sodium hydroxide solution
• B. Bubbling the gas into silver nitrate solution
• C. Placing a glass rod dipped with concentrated aqueous ammonia in the gas
• D. Holding a piece of filter paper soaked with acidified K₂Cr₂O₇(aq)

Which of the following chemical reagents can be used to distinguish between zinc nitrate solution and magnesium nitrate solution?

• A. NH₃(aq)
• B. BaCl₂(aq)
• C. AgNO₃(aq)
• D. H₂SO₄(aq)

Which of the following salt solutions gives a dirty green precipitate with sodium hydroxide solution and a white precipitate with barium chloride solution?

• A. Iron(II) sulphate solution
• B. Iron(III) sulphate solution
• C. Iron(II) chloride solution
• D. Iron(III) chloride solution

X is a white solid compound. On heating, X produces a colourless gas. When conducting a flame test on the solid residue, a brick-red flame is observed. Which of the following compounds could X be?

• A. Calcium nitrate
• B. Calcium carbonate
• C. Magnesium carbonate
• D. Strontium nitrate

Which of the following liquids, upon warming with ammonium chloride solution, would give a colourless gas with a characteristic pungent smell?

• A. Bromine water
• B. Dilute hydrochloric acid
• C. Limewater
• D. Acidified potassium dichromate solution

X is an acid. When X is mixed with silver nitrate solution, a white precipitate is produced. Through a series of experimental steps, the white precipitate is completely converted into silver oxide, which is soluble in alkali Y. Which of the combinations regarding X and Y is correct?

• A
• B
• C
• D

Carvone is a naturally occurring carbon compound that is found in various plants. Its chemical structure is shown in the diagram. Which of the following chemical reagents would give a positive result when added to carvone, which is a clear colourless liquid?

(1) Bromine (dissolved in an organic solvent)

(2) 2,4-dinitrophenylhydrazine solution

(3) Tollens’ reagent

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

In an experiment to detect the functional groups present in ibuprofen (a painkiller), four chemical tests are conducted on ibuprofen. The table lists the observations recorded. With reference to the observations, which of the following functional groups is present in ibuprofen?

• A. Aldehyde group
• B. Hydroxyl group
• C. Carbon-carbon double bond
• D. Carboxyl group