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.
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
The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent
Extraction of metals. Metal ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them.
The coordination centre, such as the brain, spinal cord or pancreas, which receives and processes information from receptors around the body.
Prove De Morgan's laws for sets: (A ∪ B)' = A' ∩ B' and (A ∩ B)' = A' ∪ B'.
A student has four pieces of resistance wire made of the same material. Each piece is connected in turn between the terminals X and Y in the circuit.
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
Here are some discussion questions related to business studies suitable for secondary education:These discussion questions can serve as a starting point for engaging classroom conversations and encouraging students to think
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
Friction is a force that opposes the relative motion or tendency of such motion of two surfaces in contact. It arises when the microscopic irregularities on the surfaces interact, creating
Mathematics is often referred to as the language of the universe. Its principles and concepts form the foundation upon which the physical sciences are built. From physics and chemistry to
Preparing for secondary practical exams can be a bit different from studying for written exams. Practical exams test your hands-on skills and understanding of experimental procedures. Here are some tips
Which sex chromosomes are present in all mature human sperm cells? A both X and Y chromosomes B either X or Y chromosomes C only X chromosomes D only Y
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
Please note that these questions cover a wide range of topics in O level Chemistry and can be used for practice and review.
Computer A is communicating with computer B. (a) Draw an arrow or arrows to show simplex, duplex and half-duplex data transmission. The direction of the data transmission must be fully
Answers to the above Questions. Leave a comment if you find a wrong answer or you have ans=y questions.1. B. Sound wave 2. B. Sound wave 3. B. Crest 4.
An algorithm has been written in pseudocode to input the names and marks of 35 students. The algorithm stores the names and marks in two arrays Name[ ] and Mark[
Pressure in physics is defined as the force per unit area applied to an object's surface. It is a fundamental concept in physics and has various applications in different fields.