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Essential Chemistry for IGCSE - Making And Identifying Salts (Section 2)

1
If you react a metal with an acid, what will happen to the metal?
Answer
(A)
The metal will dissolve, and hydrogen gas will be produced.
2
Which of these will turn red litmus paper blue?
Answer
(A)
Ammonia gas
3
What is the purpose of an indicator in a titration?
Answer
(B)
To show when the reaction is complete.
4
Which of the following is used as the indicator for Ammonia?
Answer
(A)
Blue litmus paper
5
What will be produced when zinc reacts with hydrochloric acid?
Answer
(B)
Zinc chloride and hydrogen gas
6
Which of these is the test to identify Chloride?
Answer
(A)
Add a few drops of aqueous silver nitrate
7
What color does phenolphthalein turn in an alkaline solution?
Answer
(A)
Red/Pink
8
What does the term 'cation' refer to?
Answer
(B)
A positively charged ion
9
What does the flame test reveal?
Answer
(B)
The presence of metallic cations.
10
How can you tell if a cation is present in a solution?
Answer
(B)
By observing the color change when adding sodium hydroxide
11
What observation confirms the endpoint in a titration when using methyl orange as an indicator?
Answer
(C)
The solution turns orange.
12
What is a key step when making a salt by precipitation?
Answer
(C)
Filtering the mixture to isolate the precipitate.
13
What is the purpose of repeating a titration several times?
Answer
(B)
To improve accuracy by averaging the results.
14
What type of reaction takes place when a metal displaces another metal from a solution?
Answer
(C)
Displacement
15
When preparing a salt by reacting a metal with an acid, what additional product is formed?
Answer
(C)
Hydrogen
16
Which of the following compounds is soluble in water?
Answer
(C)
Ammonium chloride
17
What will you see if you use hydrochloric acid and magnesium?
Answer
(A)
The magnesium will dissolve and release hydrogen gas.
18
What is the name given to the process of making a salt by mixing an acid and a base?
Answer
(B)
Neutralization
19
What gas is released when a metal carbonate reacts with an acid?
Answer
(C)
Carbon Dioxide
20
Which of the following can be identified by the addition of a glowing splint?
Answer
(A)
Oxygen
21
What is the test for Chlorine gas?
Answer
(C)
Use damp litmus paper
22
Which of the following is NOT a way to make salts?
Answer
(C)
Mixing two insoluble salts
23
What are the characteristics of Ammonia?
Answer
A
B
C
24
Which of the following is a key method used to identify cations?
Answer
(D)
Both adding a base and using a flame test
25
How do you know when the reaction in a titration is complete?
Answer
(B)
When the solution turns a permanent color.
26
What is the main hazard when making chlorine gas?
Answer
(D)
It is poisonous.
27
What gas is produced when a dilute acid reacts with a carbonate?
Answer
(C)
Carbon Dioxide
28
Which of the following is used to make an insoluble salt?
Answer
(A)
Mixing two soluble salts
29
What gas is produced when an acid reacts with a metal?
Answer
(B)
Hydrogen
30
What is the common name for the indicator used in the lab to test for Ammonia?
Answer
(B)
Blue litmus paper
31
Which gas is formed when a metal reacts with acid?
Answer
(C)
Hydrogen
32
What observation confirms the end point in a titration using an acid and alkali?
Answer
(B)
The solution changes color.
33
What is the test for Sulfur Dioxide gas?
Answer
(B)
Add a few drops of acidified potassium manganate(VII).
34
In a titration experiment, the indicator should ideally be added:
Answer
(B)
At the beginning of the titration.
35
Which of the following is NOT a valid method for salt production?
Answer
(D)
Mixing two insoluble compounds
36
What color will the flame be for a Lithium salt?
Answer
(A)
Red
37
What is the indicator needed for testing ammonia?
Answer
(C)
Blue litmus paper
38
Which of the following correctly describes the result of adding sodium hydroxide to a solution containing iron(II) ions?
Answer
(A)
A green precipitate is formed.
39
When aqueous sodium hydroxide is added to a solution of zinc ions, what will be observed?
Answer
(B)
A white precipitate, soluble in excess.
40
Which gas is produced during the reaction of a metal with an acid?
Answer
(B)
Hydrogen
41
What does the flame test tell us about an element?
Answer
(A)
The presence of a particular metal ion.
42
What are the products when copper(II) oxide reacts with sulfuric acid?
Answer
(B)
Copper(II) sulfate and water
43
What is the correct way to test for carbon dioxide gas?
Answer
(C)
Bubbling the gas through limewater
44
What is produced during the reaction of an acid and a base?
Answer
(A)
Water and a salt
45
What type of reaction occurs when you mix an acid and an insoluble base?
Answer
(B)
Neutralization
46
What is the common name for the reaction between an acid and an alkali?
Answer
(C)
Neutralization
47
What is the most common method for making a soluble salt from a base and an acid?
Answer
(B)
Titration
48
In the reaction: Zn + H₂SO₄ -> ZnSO₄ + H₂ , what type of reaction is occurring?
Answer
(C)
Displacement
49
When testing for oxygen, what does a glowing splint do?
Answer
(B)
Relights
50
Which gas will produce a 'pop' sound when a burning splint is placed near it?
Answer
(B)
Hydrogen