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WorksheetsIntroduction to Chemistry
Total questions: 12
Worksheet time: 12mins
Chemistry is a branch of science to study
(I) Interactions between matter
(II) Structure of matter
(III) Composition of matter
(IV) Properties of matter
I, II, and III
I, II, and IV
II, III, and IV
I, II, III, and IV
Which one is not a Chemistry career?
Lecturer
Farmer
Actuary
Anesthetist
These chemicals are used in food processing except..
Sodium chloride
Sodium carbonate
Carbon dioxide
Sodium bicarbonate
The diagram above shows an experiment carried out in laboratory. What are variables of the experiment?
Manipulated variable: Types of salt,
Responding variable: Solvent,
Constant variable: Solubility of salt
Manipulated variable: Types of salt,
Responding variable: Solubility of salt,
Constant variable: Solvent
Manipulated variable: Types of salt,
Responding variable: Solubility of salt,
Constant variable: Rate of stirring
Manipulated variable: Rate of stirring,
Responding variable: Solubility of salt,
Constant variable: Solvent
An experiment is carried out to study the solubility of sodium chloride in water and in benzene. What is the
(i) manipulated variable and
(ii) constant variable
of the experiment?
(i) Solvent and (ii) rate of stirring
(i) Solvent and (ii) mass of sodium chloride
(i) Solute and (ii) volume of solvent
(i) Solute and (ii) rate of stirring
Which of the following affects the amount of sodium chloride that can dissolve in water?
I) Volume of water
II) Rate of stirring
III) Temperature of water
IV) Size of sodium chloride
I and III only
II and IV only
I, II and III only
I, III and IV only
Which of the following symbols represents an oxidizing agent?
What precaution must be taken when storing a chemical with this label?
Store it in a dark place
Store it in a fume cupboard
Store it in a locked cupboard
Store it away from any Bunsen burner
When heating solution in a boiling tube, what precaution must you take?
Never heat the solution too strongly
Never hold the boiling tube vertically
Never use a Pyrex boiling tube to heat the solution
Never direct the mouth of the boiling tube at your classmates
An experiment should be carried out in the fume cupboard if it involves
the release of poisonous gas.
the release of flammable gas.
the use of corrosive chemicals.
the use of oxidising chemicals.
Why is it important to understand the experimental procedures before carrying out the experiment?
To prevent wastage of chemicals
To prevent accidents from happening
To prevent repetition of the experiment
To know what apparatus is needed to carry out the experiments
What are the benefits for our country from producing chemicals locally?
The government can collect tax from chemical export
The people can build residential places nearby
The industry provide job opportunities
The country save on foreign exchange
