Qualitative Analysis

10 Questions | By Pehyk | Updated: Mar 21, 2022 | Attempts: 1747

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Qualitative analysis refers to a securities analysis that uses subjective judgement based on unquantifiable information, like management expertise, industry cycles, strength of research and development and labour relations. What do you know about the concept? Let’s find out.

Questions and Answers

1.

A solid X has the following properties. (i) It is insoluble in water (ii) It gives off a gas when heated. (iii) It gives a gas when added to dilute sulfuric acid. Which one of the following could X be?
- A.
  
  Calcium hydroxide
- B.
  
  Copper (II) carbonate
- C.
  
  Sodium carbonate
- D.
  
  Zinc oxide
2.

Dilute HCl was added to a tube containing an unknown powder. The powder dissolved with no effervescence observed. After the reaction stopped, excess aqueous sodium hydroxide was added to the tube and a white precipitate formed. What was the unknown powder?
- A.
  
  Zinc oxide
- B.
  
  Lead (II) oxide
- C.
  
  Calcium oxide
- D.
  
  Calcium carbonate
3.

Which of the following CANNOT be used to distinguish between aqueous lead (II) nitrate and aqueous aluminium nitrate?
- A.
  
  Dilute hydrochloric acid
- B.
  
  Dilute sulfuric acid
- C.
  
  Aqueous potassium iodide
- D.
  
  Aqueous sodium hydroxide
4.

Two bottles in a laboratory are unlabelled. One bottle is known to contain aqueous sodium iodide and the other aqueous sodium chloride. What test would identify the solutions?
- A.
  
  Adition of aqueous lead (II) nitrate
- B.
  
  Addition of dilute sulfuric acid
- C.
  
  Addition of blue litmus paper.
- D.
  
  Addition of sodium hydroxide
5.

Which two gases each change the colour of damp blue litmus paper?
- A.
  
  Ammonia and chlorine
- B.
  
  Oxygen and hydrogen chloride
- C.
  
  Carbon dioxide and hydrogen
- D.
  
  Carbon dioxide and chlorine
6.

A pale green solution X gives a green precipitate with excess aqueous sodium hydroxide. An alkaline gas is only given off when the mixture is warmed with powdered aluminium. Which ion does X contain?
- A.
  
  Ammonium and copper(II)
- B.
  
  Ammonium and iron (III)
- C.
  
  Copper (II) and nitrate
- D.
  
  Iron (II) and nitrate
7.

What reaction occurs when aqueous copper (II) sulfate is added to aqueous sodium hydroxide?
- A.
  
  Displacement
- B.
  
  Redox
- C.
  
  Precipitation
- D.
  
  Neutralisation
8.

Excess barium nitrate is added to dilute sulfuric acid. The precipitate formed is removed by filtration. What ions are present in the filtrate?
- A.
  
  Ba2+ and NO3-
- B.
  
  Ba2+, H+ and NO3-
- C.
  
  H+ and NO3-
- D.
  
  H+, NO3- and SO42-
9.

Which of the following pairs of solutions give a white precipitate when mixed?
- A.
  
  Sodium chloride and lead (II) nitrate
- B.
  
  Barium nitrate and calcium chloride
- C.
  
  Iron (II) chloride and sodium hydroxide
- D.
  
  Sodium sulfate and aluminium chloride
10.

Under suitable conditions, dilute HCl reacts with each of the following substances. Which reaction gives a colourless solution only?
- A.
  
  Aqueous silver nitrate
- B.
  
  Calcium carbonate
- C.
  
  Copper (II) oxide
- D.
  
  Limewater