“Believe in yourself. You are braver than you think, more talented than you know, and capable of more than you imagine.” ― Roy T. Bennett, The Light in the Heart
In the Periodic Table, how does the metallic character of the elements vary from left to right across a period? A It decreases. B It increases. C It increases then
Brownian motion, or pedesis (from Ancient Greek: πήδησις /pɛ̌ːdɛːsis/ "leaping"), is the random motion of particles suspended in a medium (a liquid or a gas).[2] This pattern of motion typically
A student takes 2 g samples of calcium carbonate and adds them to 20 cm3 samples of dilute hydrochloric acid at different temperatures. She measures how long it takes for
The reactivity series, also known as the activity series, is a list of metals arranged in order of their reactivity. In this series, metals are ranked from the most reactive
Acids can be prepared through various methods depending on the specific acid required and the..
noble gas, any of the seven chemical elements that make up Group 8 (VIII) of the periodic table.
“A woman or man of value doesn’t love you because of what he or she wants you to be or do for them. He or she loves you because your
The General Certificate of Secondary Education (GCSE) and the International General Certificate of Secondary Education (IGCSE) are two widely recognized qualifications for students aged 14 to 16. Both curricula cover
Acidity and basicity are fundamental concepts in chemistry that describe the properties of substances and their behavior in aqueous (water-based) solutions. These concepts are often associated with the pH scale,
Which metal would be suitable for all of the following uses? • making aircraft bodies • making food containers • making overhead power cables
In chemistry, an alcohol is a type of organic compound that carries at least one hydroxyl (−OH) functional group bound to a saturated carbon atom.
The kinetic theory of gases is a simple, historically significant classical model of the thermodynamic behavior of gases, with which many principal concepts of thermodynamics were established.
Please note that these questions cover a wide range of topics in O level Chemistry and can be used for practice and review.
In chemistry and manufacturing, electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the
quizzes play a crucial role in assessing student understanding, promoting active learning, providing feedback, enhancing motivation, and preparing students for larger assessments
In organic chemistry, an alkene is a hydrocarbon containing a carbon–carbon double bond. The double bond may be internal or in the terminal position.
stoichiometry is the relationship between the quantities of reactants and products before, during, and following chemical reactions.
Which statement is not correct? A-> Petroleum is a mixture of hydrocarbons. B ->The main constituent of natural gas is ethane. C-> The naphtha fraction of petroleum is used for
Solubility is a measure of the ability of a substance (solute) to dissolve in a given solvent under specific conditions, typically at a certain temperature and pressure. It is expressed