Subjects
Chemistry practice, free.
Solutions, gases, the mole, equilibrium, atoms and bonding, from school and entrance exams. Every question has an explanation, and the tests are timed like the real thing.
- 254questions
- 13topics
- 3exams covered
- Freeno plans or paywalls
Chemistry in Bangladesh
Practise chemistry with the exams you can take in Bangladesh.
Where do you want to start?
- 104 questions · 6 topicsPhysical chemistryThe mole, solutions, gases, equilibrium and rates: the calculations of chemistry.Chemical Equilibrium, Energetics and Environmental Chemistry · Solutions, Chemical Equilibrium and Environmental Toxicology · States of matter
- 75 questions · 3 topicsOrganic chemistryCarbon compounds, their groups and reactions.Organic Chemistry, Quantitative Analysis and Electrochemistry · Organic Reactions, Biomolecules and Pharmaceutical Principles · Organic chemistry basics
- 75 questions · 4 topicsAtoms and bondingAtomic structure, the periodic table and how atoms bond.Atomic Structure, Periodic Properties and Chemical Bonding · Qualitative Analysis, Chemical Bonding and Periodic Trends · Periodic properties
The most practised topics.
Each topic has its own list of questions with explanations. Pick the exam you are preparing for.
Chemical Equilibrium, Energetics and Environmental Chemistry
35 questions across 1 exam
Solutions, Chemical Equilibrium and Environmental Toxicology
35 questions across 1 exam
Organic Chemistry, Quantitative Analysis and Electrochemistry
35 questions across 1 exam
Organic Reactions, Biomolecules and Pharmaceutical Principles
35 questions across 1 exam
Atomic Structure, Periodic Properties and Chemical Bonding
35 questions across 1 exam
Qualitative Analysis, Chemical Bonding and Periodic Trends
35 questions across 1 exam
States of matter
17 questions across 1 exam
Mole concept
9 questions across 1 exam
Real questions, worked answers.
- Chemical Equilibrium, Energetics and Environmental Chemistry · Higher Secondary Certificate Examination (Bangladesh)What is the relation between equilibrium constants K p and K c for a general gaseous reaction?See the answer and explanation →
- Solutions, Chemical Equilibrium and Environmental Toxicology · Medical College Admission Test (Bangladesh)What is the physiological osmolarity of human blood plasma (Hard) and isotonic saline solution?See the answer and explanation →
- Organic Chemistry, Quantitative Analysis and Electrochemistry · Higher Secondary Certificate Examination (Bangladesh)According to Markovnikov's rule, when an unsymmetrical reagent like HBr adds to Propene (CH3-CH=CH2), what is the major product?See the answer and explanation →
Practise it for real.
How to practise chemistry.
- 1
Balance the equation first
Most mole and mass questions fall apart when the equation is not balanced. Do it before any numbers.
- 2
Write the units and the formula you use
Moles, grams, litres and concentration are easy to mix up. Units on every line keep you honest.
- 3
Learn trends as patterns
Periodic trends are a few rules, not a long list. Learn why they go up or down across a period and down a group.
- 4
Do a rough check
Ask whether the answer is the right size. A negative concentration or a mass larger than you started with means a slip.
- 5
Redo your mistakes after a week
Repeat the questions you got wrong after a few days. That is when a method either sticks or fades.
Questions, answered.
- Is the chemistry practice really free?
- Yes. Every question, explanation, mock test and flashcard deck is free, with no plans or paywalls.
- Which exams does it cover?
- Chemistry questions from Higher Secondary Certificate Examination (Bangladesh), Medical College Admission Test (Bangladesh), Cambridge A-Level. There are 254 chemistry questions on this page's list today.
- Does every question have an explanation?
- Yes. Each question has an explanation with the working or the key idea, and you can open any question on its own page.
- Can I take a timed test?
- Yes. The mock tests below run on a real timer and show a full review with explanations at the end.