NEW
Font size
WorksheetsChapter 8 Acids, Bases and Salts
Total questions: 30
Worksheet time: 8mins
If the given solution turns the litmus paper blue , it is ..........................
An Acid
A base
Neutral
Colourless
Substance which are bitter in taste and slippery in touch is known as
Salty
Sweet
Base
Acid
Acids present in plants and animals are called ______.
Mineral Acids
Natural Acids
Dilute Acids
Concentrated Acids
Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are:
pink and colourless
blue and red
red and blue
colourless and pink
A colourless and odourless gas is liberated when hydrochloric acid is added to a solution of sodium carbonate. The name of the gas is
Carbon dioxide
Nitrogen dioxide
Sulphur dioxide
Sulphur trioxide
A salt is formed when nitric acid combines with sodium hydroxide. What are present in the salt that forms?
Sodium chloride
sodium ions and nitrate ions
only sodium ions
only nitrate ions
Which of the following indicator will show the pH level of acid, neutral and alkali?
Phenolphtalein
Universal indicator
Methyl orange
Litmus paper
Which of the following metals has NO reaction with a dilute acid?
Copper
Zinc
Calcium
Iron
What is the formula for nitric acid?
HNO2
HNO3
HNO4
H2NO3
When a bee stings, immediately a paste of lime is put on the sting. Why?
Bee sting is made of a base
Bee sting contains an acid called formic acid. It gets neutralised with CaO
Bee sting is acidic due to hydrochloric acid and this is neutralised
All of the above
A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:
2
5
7
10
How does diluting an acid with water affect its pH?
The pH decreases towards 7
The pH increases towards 7
The pH decreases towards 1
It has no effect on the pH
What happens to the pH of a solution of hydrochloric acid as calcium oxide is added?
It rises
It falls
It stays the same
It starts to rise, than falls back
A small amount of hydrochloric acid is dissolved in a large volume of water. What is the best description of this solution?
A dilute solution of weak acid
A weak solution of strong acid
A dilute solution of strong acid
A weak solution of weak acid
Give 1 example of neutralizing reaction in daily life ?
In stomach with food and our stomach acid
With rusting iron with the contact of moisture .
Both 1 & 2
None of the above
Select the formula for the following acid: perchloric acid
HClO4
HClO3
HClO2
HCl
Five solutions A,B,C, and D when tested with universal indicator showed pH as 4,1,11, and 9, respectively. Which solution is weak acid
A
B
C
D
What is the name of the following acid: H2SO3
hydrosulfuric acid
sulfuric acid
sulfurous acid
persulfuric acid
10 mL of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be-
(a) 4 mL
(b) 8 mL
(c) 12 mL
(d) 16 mL
What is the formula for Iron (II) hydroxide?
Fe(OH)2
FeOH
FeOH2
Fe2OH
When naming acids, change "-ite" to:
-ate
-ic
-ous
-ite
What is the name of the acid HBr?
hydrogen bromide acid
bromic acid
bromous acid
hydrobromic acid
What is the possible pH of concentrated sulfuric acid?
1.0
7.0
12.0
5.0
Zn(OH)2 is an example of a __________.
acid
base
salt
An acid reacts with metal to produce __________.
carbon dioxide
hydrogen gas
hydrogen gas + salt
hydrogen gas + water
A neutralisation reaction produces __________.
an acid
a neutral substance
only water
salt and water
According to the pH scale, which item is more acidic than lemons?
battery
vinegar
milk
blood
