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WorksheetsChapter 1 Introduction to Chemistry
Total questions: 30
Worksheet time: 15mins
"The process of making a preliminary conclusion to describe an event"
Which is a step in scientific investigation related to this statement?
Make inference
make variables
Preparing a report
Controlled variables
Which of the following is the function of the fume chamber in a laboratory?
Protects the body from the splash of chemicals
Protects the respiratory system from toxic materials
Cleaning or washing of body parts affected by hazardous chemicals
To remove polluted air and vapour out of the laboratory
Chemistry is ......
a field of science that studies the structure of atoms and molecules
a field of science that studies the composition, structure, properties and interactions of matter
a science field which studies chemical reactions
the field of science that studies scientific research
What should be done if a thermometer breaks in the laboratory?
Scoop the chemical spillage
Stop the spillage from spreading by using sand to form a boundary
Sprinkle salt powder onto the spillage
Inform the teacher immediately and sprinkle sulphur powder onto the spillage
Which the following careers is related to the field of chemistry?
Policeman
Fireman
Forensic scientist
Prime minister
How the reactive materials such as sodium, need to be stored?
should be stored away from heat and sunlight sources
should be stored in dark bottles
need to be stored in paraffin oil
must be stored in special cabinets and locked
Suggest a proper way to dispose of volatile materials such as alcohol, ammonia and bromine.
should be disposed of in special containers
higher concentration should be first diluted with water and dissolved in sodium sulphite before it is poured into the basin
should be kept in neatly sealed containers and labeled before disposal
should be kept in sealed containers and kept away from heat and light sources
Which of the following statement is true?
All senses must be used during observation
Data should be changed whenever necessary
One measurement is enough to ensure accuracy
Interpretation of data should be done objectively
The scientific method involves the following variables, except...
chemical variable
fixed variable
manipulated variable
responding variable
Where does the word 'Chemistry' derive from?
Mandarin word 'huaxue'
Malay word 'kimia'
Arabic word 'al-kimiya'
Spanish word 'chemia'
What is the chemical name for common salt?
sodium carbonate
sodium bicarbonate
monosodium glutamate
sodium chloride
Chemistry is involved in the following industries, except...
logging industry
nutritional industry
mining industry
paint making indutry
How does baking powder help in making dough rise during baking?
it hardens the dough
it softens the dough
it absorbs water from the dough
it produces carbon dioxide that causes the dough to rise
The different fractions in petroleum can be separated by using technique of fractional distillation because they have different...
boiling points
colours
densities
viscosities
Which of the following natural occurring chemicals can be used in our daily lives in its natural form?
bauxite
hematite
limestone
sulphur
Chemistry is one of the fields of science that studies the
I structure of matter
II properties of matter
III composition of matter
IV interactions of matter
I, II and III
I, II and IV
II, III and IV
I, II, III and IV
Which chemical is widely used in medicine?
Analgesic
Preservative
Colouring
Polymer
Which of the following occupations does not require knowledge in chemistry?
Doctor
Judge
Pharmacist
Chemist
Which arrangement of the steps in scientific method is correct?
Making observation → Identifying problem → Making hypothesis → Controlling variables → Planning an experiment → Collecting data → Making conclusion
Making observation → Making hypothesis → Identifying problem → Planning an experiment → Controlling variables → Collecting data → Making conclusion
Making observation → Identifying problem → Controlling variables → Making hypothesis → Planning an experiment → Collecting data → Making conclusion
Making observation → Identifying problem → Making hypothesis → Controlling variables → Collecting data → Planning an experiment → Making conclusion
Which of the following is not a personal protective equipment?
Safety goggles
Eyewash
Face mask
Laboratory shoes
Which combination is correct about personal protective equipment and safety equipment with its function?
Equipment: Fume chamber
Function: A specially designed equipment to handle radioactive substances
Equipment: Safe shower
Function: Safety equipment to wash the body when expose to chemicals in the laboratory
Equipment: Safe shower
Function: Safety equipment to wash the body when expose to chemicals in the laboratory
Equipment: Face mask
Function: To protect the face from haze
Kasim accidentally added ethanol into distilled water. Suggest the most suitable scientific method to Kasim to separate the mixture.
Neutralisation
Titration
Distillation
Electrolysis
Which substance can be disposed into the sink of a laboratory?
Ethanol
Concentrated acid hydrochloric
Concentrated hydrogen peroxide
Mercury
The followings are symptoms of mercury poisoning except
difficulty in breathing
nausea
cough
increase in appetite
The _____ _____ is a logical systematic approach to the solution of a scientific problem.
applied chemistry
pure chemistry
scientific method
scientific law
Which variable is the variable that you change during the experiment
Experimental variable
Independent variable
Control
Dependent variable
Which step in the scientific method requires you to use your senses to obtain information?
revising a hypothesis
making an observation
designing an experiment
stating a theory
A theory is a ____.
proposed explanation for an observation.
well-tested explanation for a broad set of observations.
summary of the results of many observations.
procedure used to test a proposed explanation.
Chemical reactions
always absorb energy
can either absorb or release energy
do not have energy changes
always release energy
Chemical reactions
always absorb energy
can either absorb or release energy
do not have energy changes
always release energy
