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
Find below the main terms used in secondary-level chemistry and their definitions:These are some fundamental terms in secondary-level chemistry, and understanding them is essential for grasping the basics of the
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
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
quizzes play a crucial role in assessing student understanding, promoting active learning, providing feedback, enhancing motivation, and preparing students for larger assessments
Two industrial processes that involve heating are • extracting iron from its ore using a blast furnace, • making lime. In which of these processes is calcium carbonate used?
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.
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
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.
These questions should stimulate in-depth discussions about polymerization, its mechanisms, applications, and implications in various fields.
Acids can be prepared through various methods depending on the specific acid required and the..
1 (a) Complete the following equations.(b) An element Y has three naturally occurring isotopes with isotopic masses and relativeabundances as shown below:Calculate the average atomic mass of Y.2. Complete the
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
Synthetic polymerization refers to the process of chemically synthesizing polymers, which are large molecules composed of repeating subunits called monomers.
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, an alcohol is a type of organic compound that carries at least one hydroxyl (−OH) functional group bound to a saturated carbon atom.
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,
Inorganic chemistry is a branch of chemistry that focuses on the study of inorganic compounds, which are compounds that do not contain carbon-hydrogen (C-H) bonds. Instead, inorganic chemistry primarily deals
noble gas, any of the seven chemical elements that make up Group 8 (VIII) of the periodic table.
Students should practice, manage time, and organize materials for practical exams, while remaining calm and following instructions. Instructors should offer clear guidance, create a conducive environment, and fairly assess and