Worksheets6.1 Role of water in showing acidic and alkaline properties
Total questions: 25
Worksheet time: 13mins
A substance can be classified as acid if it can produce
What is an alkali?
Substance that ionise in water to produce hydrogen ions
Substance that produce water when react with metal
A base that is soluble in water
Basicity of acids is ...
Reaction to produce salt and water
Number of hydrogen ions produces by acid molecule when ionise in water
Number Number of hydroxonium ions produces by acid molecule when ionise in water
What is the classification for carbonic acid
Monoprotic acid
Diprotic acid
Triprotic acid
What are the examples of alkaline solution?
Hydrochloric acid
Sodium hydroxide solution
Vinegar
Soap water
What are the examples of acid ?
Sodium hydroxide solution
Soap water
Hydrochloric acid
Vinegar
Acids
pH value less than 7
Tastes bitter
Corrosive
Reacts with metals to produce hydrogen gas
Alkali
pH value more than 7
Tastes bitter
Corrosive
Tastes sour
Acid in soft drink:
Hydrochloric acid, HCl
Sulfuric acid, H2SO4
Ethanoic acid (acetic acid), CH3COOH
Carbonic acid, H2CO3
Acid in car battery:
Hydrochloric acid, HCl
Sulfuric acid, H2SO4
Ethanoic acid (Acetic acid), CH3COOH
Carbonic acid, H2CO3
Which type of ion does an acid produce when it is dissolved in water?
oxide
oxygen
hydroxonium
hydroxide
Jeff want to test a sodium hydroxide solution by using red litmus paper, what colour will he observe?
Pink
Purple
Red
Blue
In your opinion, which of the following products contain acid?
Lemon tea
Toothpaste
Carbonate Drink
Vinegar
What is the basicity of sulphuric acid?
Monoprotic acid
Diprotic acid
Triprotic acid
Tetraprotic acid
Sodium hydroxide pellet can show the following characteristics:
turn red litmus paper to blue
turn blue litmus paper to red
produce OH- ions
none of the above
CH3COOH, ethanoic acid or also known as acetic acid is a type of __________.
triprotic acid
diprotic acid
polyprotic acid
monoprotic acid
Potassium hydroxide, KOH can exhibit the following properties when dissolved in benzene(organic solvent) :
turn blue litmus paper to red
turn red litmus paper to blue
no reaction
Which of the following is correct meaning of acids
Chemical substances ionises in water produce hydroxide ion
Chemical substances ionises in organic solvent produce hydroxide ion
Chemical substances ionises in water produce hydrogen ion
Chemical substances ionises in organic solvent produce hydrogen ion
Basicity of acids refers to ......that can be produced by acid molecule when ionises in water
Number of hydrogen atom
Number of hydrogen ion
Number of hydroxide ion
Number of hydroxide atom
A base that ionises in water s called .....
Acid
Alkali
Molecule
Ion
Alkali is a substances that ionises in water to produce ....
Hydrogen ion
Hydrogen atom
Hydroxide ion
Hydroxide atom
Acids and alkali only show their properties in the presence of ....
Organic solvent
Water
Carbon dioxide
Oxygen
Acid in our stomach:
Hydrochloric acid, HCl
Sulfuric acid, H2SO4
Ethanoic acid (Acetic acid), CH3COOH
Carbonic acid, H2CO3
Zn(OH)2 is an example of a...
acid
base
salt
alkali
Which of the following about ammonia is correct?
Its formula is NH4+.
It turns moist red litmus paper blue.
It has no special odour (smell).
It is a salt.
