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Year 11 HSC Chemistry practice questions
Use this no-login public demo to preview Skill Align's Year 11 HSC Chemistry sample questions, explanations, exercise mode, and test mode before regular practice.
Sample-question focus
Try a short public sample of Year 11 HSC Chemistry questions selected from the reviewed Skill Align demo set.
Skills covered
Practice atomic structure, bonding, chemical reactions, stoichiometry, equilibrium, acids and bases, organic chemistry, analysis, and modelling.
Exercise and test mode
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Curriculum link
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Sample HSC Year 11 Chemistry questions
These sample questions are visible on the page before login. They show HSC Year 11 Chemistry particle models, bonding, stoichiometry, reaction profiles, rates, and acid-base data with diagrams, tables, curves, and spectra before opening the demo.
HSC Year 11ChemistryBondinghardLewis structure
1. A Lewis diagram for carbon dioxide shows O=C=O. How many shared electron pairs are in each C=O bond?
Choices
Two shared pairs
One shared pair
No shared pairs
Four lone pairs on carbon
Explanation:
A double bond consists of two shared electron pairs between the bonded atoms.
HSC Year 11ChemistryReactionshardparticle model
2. A particle model shows 3 mol H2 mixed with 1 mol O2 for 2H2 + O2 -> 2H2O. Which reactant is left over after complete reaction?
Choices
H2
O2
H2O
No atoms remain
Explanation:
One mole of O2 reacts with 2 mol H2, leaving 1 mol H2 unreacted.
HSC Year 11ChemistryQuantitative chemistryhardstoichiometry table
3. A table uses molar mass 100.1 g mol^-1 for calcium carbonate. What amount is present in a 25.0 g sample?
Choices
0.250 mol
4.00 mol
2500 mol
75.1 mol
Explanation:
Use n = m / M. 25.0 / 100.1 = 0.2497..., which rounds to 0.250 mol.
HSC Year 11ChemistryEnergy profileshardreaction profile
4. A reaction profile marks reactants at 40 kJ mol^-1 and the activated complex at 95 kJ mol^-1. What is the activation energy?
Choices
55 kJ mol^-1
40 kJ mol^-1
95 kJ mol^-1
135 kJ mol^-1
Explanation:
Activation energy is the energy gap from reactants to the peak: 95 - 40 = 55 kJ mol^-1.
HSC Year 11ChemistryAcidshardpH scale
5. Sample A has pH 3 and sample B has pH 6. How many times greater is the hydrogen ion concentration in A?
Choices
1000 times
3 times
100 times
0.001 times
Explanation:
The pH difference is 3, so the hydrogen ion concentration differs by 103.
HSC Year 11ChemistryMolecular polarityhardbond-polarity diagram
6. A polarity diagram for ammonia shows N-H bond dipoles pointing toward nitrogen. What does this show?
Choices
Nitrogen is more electronegative.
Hydrogen is the only negative atom.
The molecule contains ions only.
The N-H bond is metallic.
Explanation:
Bond dipoles point toward the atom attracting the bonding electrons more strongly.
For parents comparing HSC Year 11 Chemistry support
HSC Year 11 Chemistry practice should help students connect chemical reasoning to visible evidence: particle models, bonding, stoichiometry, reaction profiles, rates, and acid-base data. These examples preview that visual reasoning before the no-login Chemistry demo.
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Practice Summary
Year 11 · HSC Chemistry · Test mode · 12 questions · 10 min
Questions attempted0 / 12
Correct answersPending
Score-
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Does this page include Year 11 HSC Chemistry practice questions?
Yes. This public demo includes reviewed Year 11 HSC Chemistry sample questions so families can preview the Skill Align practice style before regular use.
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