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Gaseous State Quiz Online
Gaseous State concepts are essential to learning for every level in chemistry courses. Here, we have compiled many Gaseous State quizzes free for students of grades 11 and 12. We hope you will find this very useful for your regular exam preparations and entry tests at undergraduate levels, particularly for medical and engineering students (MDCAT,…
What is melting point? Definition
The most comprehensive Melting point Definition is, The temperature at which liquid & solid form of a substance co-exits in equilibrium under given pressure, is called Melting point. Normally standard pressure is taken as 1 atmosphere. In other way, we can also define melting point as, The temperature at which solid phase of a substance…
X-Rays and Atomic Number
These rays, which are produced when rapidly moving electrons collide with the heavy metal anode in the discharge tube, is called X-rays. Explanation: Energy is released in the form of electromagnetic waves when the electrons are suddenly stopped. In the discharge tube, the electrons produced by a heated tungsten filament are accelerated by high voltage….
Plank’s Quantum Theory
In 1900, Max Planck proposed the quantum theory to explain the emission and absorption of radiations. Heated objects give off these radiations. According to his revolutionary hypothesis, energy travels in a discontinuous manner and is composed of a large number of tiny discrete units called quanta. Main postulates of Plank’s Quantum Theory: The main points…
Thermochemistry Quiz Online
Thermochemistry concepts are essential to learning for every level in chemistry courses. Here, we have compiled many Thermochemistry quizzes free for students of grades 11 and 12. We hope you will find this very useful for your regular exam preparations and entry tests at undergraduate levels, particularly for medical and engineering students (MDCAT, ECAT, NUST,…
