Rock salt is a mixture of sand and sodium chloride.Sodium chloride is soluble in water but not in hexane.Sand is insoluble in both water and hexane.What is required to separate
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
A mixture is separated using the apparatus shown. What is the mixture? A aqueous copper chloride and copper B aqueous copper chloride and sodium chloride C ethane and methane D
The enthalpy of a chemical reaction, often denoted as ΔH (delta H), is a measure of the heat energy absorbed or released during a chemical reaction at constant pressure. Enthalpy
1.What is the definition of an acid according to the Arrhenius theory? a) A substance that donates protons (H⁺ ions) in aqueous solution b) A substance that accepts protons (H⁺
Hydrogen can be used as a fuel. Which properties of hydrogen would be advantages and which would be disadvantages? 1 2 3 Hydrogen is expensive to produce. Hydrogen reacts exothermically
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.
Molding tools are essential in various manufacturing processes, enabling the creation of consistent and precise products. They are used in different types of molding techniques, including injection molding, compression molding,
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
Physical chemistry and organic chemistry are two distinct subfields within the broader discipline of chemistry, and they focus on different aspects of the subject. Here are the key differences between
“Wherever we look, the work of the chemist has raised the level of our civilization and has increased the productive capacity of our nation.” ― Calvin Coolidge
Hardness refers to a material's resistance to indentation, scratching, or abrasion. It is a measure of how easily a material can be scratched or deformed by an external force.
These questions should stimulate in-depth discussions about polymerization, its mechanisms, applications, and implications in various fields.
Performing well in subjects with practical papers requires a combination of preparation, organization, and effective test-taking strategies. Here are some tips to help you excel in such subjects:Remember that practice,
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
Find questions related to air and water chemistry in the slides contained in this post.
To enhance student performance in practical exams, educators should ensure clear communication, provide hands-on practice, create interactive learning environments, give timely feedback, and encourage collaboration, self-assessment, and time management.
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.
1. (a) Using an example in each case, define the following terms.(i) Hygroscopic substance (ii) Deliquescent substances(iii) Efflorescent substances(iv) Hydrated compound(v) Anhydrous substance2. (a) Magnesium ribborn was burnt in air until
stoichiometry is the relationship between the quantities of reactants and products before, during, and following chemical reactions.