What is meant by Latent HeatLatent HeatFigure shows some ice cubes in a persons hand. The person makes the following observations and inferences, as shown in Table.ObservationInferenceThe ice is colder than the surroundings.Heat energy is continuously b…

What is the Relationship between a Mole and Avogadro’s numberAvogadro’s number Atoms and molecules are so small in size that they cannot be counted individually. The chemists use the unit mole for counting atoms, molecules or ions. It is represented by n…

How does Pressure Affect Changes of StateEffect of Change of PressureThe three states of matter differ in the intermolecular forces and intermolecular distances between the constituent particles.Gases are compressible because on applying pressure, the sp…

What is the Hybridization of the Carbon atoms in Ethylenesp2 HybridisationConsider ethene (ethylene, CH2 = CH2) molecule as the example. In the formation of CH2 = CH2 each carbon atom in its excited state undergoes sp2 hybridisation by intermixing one s…

What is Molecular Mass Molecular mass/Formula mass Molecular mass expresses as to how many times a molecule of a substance is heavier than th of the mass of an atom of carbon (carbon-12). Thus, Molecular mass = \(\frac { Mass\quad of\quad a\quad molecul…

What is the Need for Classification of Elements?Need of Classification : It is difficult to study each and every element individually and to know its properties and uses. Therefore, they have been classified into groups on the basis of their similaritie…

What is an sp3 Hybridized Carbon atom sp3 HybridisationIn the excited carbon atom its one s-orbital (2s) and three p-orbitals (2px , 2py, 2pz) intermix and reshuffle into four identical orbitals known as sp3 orbitals. Thus, carbon atom undergoes  sp3 hy…

What are the Main Functions of the Root System in a PlantRoot systems There are two main types of root systems: tap root and fibrous root system.Tap Root System In the tap root system, a single root (called the primary root) comes out from the seed afte…

What is Temperature and Can Temperature be Measured DirectlyTemperatureThe degree of ‘hotness’ or ‘coldness’ of a body or a place is called temperature. One of the methods of measuring the degree of hotness and coldness is by the sense of touch. But our…

How many Types of Fire Extinguishers are thereExtinguishing a FireA fire can be extinguished using water. Water evaporates, taking away heat from the fire, which in turn cools down the burning material well below its ignition temperature. However, there …