Introduction to Chemistry
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Importance of Chemistry
SubtopicImportance of Chemistry under Introduction to Chemistry for Grade 6 ICSE.
Preview questions (no answers)
- 1.
Which chemical gas is compressed inside fire extinguishers to help put out fires?
A.Oxygen
B.Hydrogen
C.Carbon dioxide
D.Helium
- 2.
Which metal is most commonly used to make electric wires because it is a great conductor of electricity?
A.Copper
B.Lead
C.Mercury
D.Sodium
- 3.
Which of the following activities involves a chemical change?
A.Cutting paper
B.Melting ice
C.Cooking an egg
D.Breaking a glass
- 4.
For humans and animals, what is the primary source of chemical energy required to perform work?
A.Sunlight
B.Water
C.Food
D.Air
- 5.
Which of these is an example of a chemical used in the cosmetic industry as a thickening agent in lotions?
A.Glycerin
B.Stearic acid
C.Methanol
D.Acetone
- 6.
Which chemical is used in the tanning industry to process animal hides into leather?
A.Chromium salts
B.Sodium chloride
C.Potassium chlorate
D.Calcium carbonate
- 7.
Which specific chemical is found in 'Enamel' of teeth that chemistry helps to protect through fluoride treatment?
A.Calcium Hydroxyapatite
B.Sodium Chloride
C.Potassium Nitrate
D.Magnesium Sulfate
- 8.
What is the chemical reason why 'Stainless Steel' does not rust like ordinary iron?
A.It is painted with a special chemical layer
B.It contains Chromium, which forms a protective oxide layer
C.It is stored in a vacuum-sealed environment
D.It is made by removing all the carbon from the iron
- 9.
Which scientist is known for proposing the 'Atomic Theory', which stated that all matter is composed of small, indivisible particles called atoms?
A.Ernest Rutherford
B.John Dalton
C.Niels Bohr
D.J.J. Thomson
- 10.
What is the role of 'Tartaric Acid' when it is added to baking soda to make baking powder?
A.It adds a sweet taste to the cake
B.It reacts with baking soda to release gas
C.It prevents the flour from clumping together
D.It acts as a preservative to keep the bread fresh
Download the worksheet for Introduction to Chemistry - Importance of Chemistry to practice offline. It includes additional chapter-level practice questions.
Common Laboratory Apparatus
SubtopicCommon Laboratory Apparatus under Introduction to Chemistry for Grade 6 ICSE.
Preview questions (no answers)
- 1.
Which of the following laboratory tools, represented as 'Tool X' in the procedure below, is specifically designed with bristles to scrub and clean the inner walls of test tubes?
A.Glass rod
B.Test tube holder
C.Test tube brush
D.Spatula
- 2.
Which apparatus is used to keep substances dry by storing them in a moisture-free environment?
A.Desiccator
B.Trough
C.Conical flask
D.Beaker
- 3.
A flask with a mark on its neck used to prepare a specific, large volume of solution (e.g., ) is a:
A.Volumetric flask
B.Boiling tube
C.Gas jar
D.Retort
- 4.
Which of these apparatus is NOT used for measuring volume?
A.Burette
B.Pipette
C.Measuring cylinder
D.Test tube stand
- 5.
Which apparatus is used to place a hot evaporating dish so it can cool down without damaging the lab bench?
A.Tripod stand
B.Wire gauze
C.Heat-resistant mat
D.Filter paper
- 6.
Which of these is the correct method for smelling a chemical in a test tube?
A.Inhale deeply directly above the tube
B.Fan the vapors toward your nose with your hand
C.Put your nose inside the mouth of the tube
D.Ask a friend to smell it first
- 7.
Identify the apparatus used to separate two immiscible liquids like oil and water.
A.Filter funnel
B.Separating funnel
C.Thistle funnel
D.Delivery tube
- 8.
If a student needs to evaporate a salt solution to obtain the crystals quickly, which setup would be most efficient?
A.A test tube held over a burner
B.An evaporating dish placed on a wire gauze over a Bunsen burner
C.A beaker left in the sunlight
D.A watch glass placed inside a desiccator
- 9.
When preparing a solution of a known concentration, which piece of apparatus is used to make up the liquid to a precise final volume?
A.Graduated Cylinder
B.Volumetric (Measuring) Flask
C.Beaker
D.Conical Flask
- 10.
Which of these materials is a 'Crucible Tongs' primarily made of, and why?
A.Plastic, to prevent conducting heat
B.Stainless steel or brass, to withstand high temperatures without melting or corroding
C.Wood, to ensure the crucible doesn't get scratched
D.Aluminum, because it is lightweight and easy to handle
Download the worksheet for Introduction to Chemistry - Common Laboratory Apparatus to practice offline. It includes additional chapter-level practice questions.
Safety Rules in Chemistry Laboratory
SubtopicSafety Rules in Chemistry Laboratory under Introduction to Chemistry for Grade 6 ICSE.
Preview questions (no answers)
- 1.
Which of the following is an unsafe way to use a Bunsen burner?
A.Tying back long hair
B.Leaving the burner lit and unattended
C.Checking the gas tube for leaks
D.Using a spark lighter to light it
- 2.
How should you clean your laboratory equipment after an experiment?
A.Wipe it with your handkerchief
B.Wash it thoroughly with water and lab detergent
C.Just blow the dust off
D.Leave it for the teacher to clean
- 3.
What is a 'Fume Hood' used for in the laboratory?
A.To store your lunch
B.To perform experiments that produce harmful gases
C.To dry your hands
D.To keep the lab warm
- 4.
What does a 'Toxic' symbol (skull and crossbones) indicate?
A.The substance is a nutrient
B.The substance is poisonous and can cause death
C.The substance is safe to inhale
D.The substance is a common salt
- 5.
A student is following the safety procedure shown in the flowchart below to fix a glass delivery tube into a rubber stopper. What is the primary reason for performing Step 2?
A.To clean the glass tube and remove any chemical residues before use
B.To reduce friction so the tube slides in easily without shattering
C.To ensure that the seal becomes completely airtight for the gas
D.To help the student identify if the glass tube has any small cracks
- 6.
What should be your final task before leaving the chemistry laboratory?
A.Finish your snack
B.Turn off all lights and fans only
C.Ensure your workspace is clean, gas/water taps are closed, and hands are washed
D.Wait for the bell and run out
- 7.
Why is it important to keep the sink clear of solid materials like matches or broken glass?
A.To keep the sink looking shiny
B.To prevent clogging of the drainage pipes
C.To make it easier for the teacher to wash their hands
D.Because solid materials react with the metal of the sink
- 8.
Why is it important to keep flammable liquids like alcohol far away from an open flame?
A.Alcohol evaporates faster when it is near heat
B.Vapors of flammable liquids can catch fire even from a distance
C.The flame will turn green if alcohol is nearby
D.Heat makes the alcohol less effective as a solvent
- 9.
What is the danger of using a cracked glass beaker for heating?
A.The crack will disappear upon heating
B.The beaker is likely to shatter when the liquid inside gets hot
C.The chemicals will react with the air through the crack
D.The liquid will evaporate much faster
- 10.
Why must you never leave a lit Bunsen burner unattended?
A.The gas bill will increase unnecessarily
B.The flame might go out, leading to a dangerous gas buildup in the room
C.The burner will overheat and melt the rubber tubing
D.The air in the room will be completely used up
Download the worksheet for Introduction to Chemistry - Safety Rules in Chemistry Laboratory to practice offline. It includes additional chapter-level practice questions.