The downhill movement of masses of rock debris and other materials under the direct influence of gravity is termed mass movement. Mass movements... View Article
Excess accumulation of greenhouse gases such as carbon dioxide, methane, nitrous oxide, ozone, CFC causes warming of the earth is called global... View Article
Atomic number (Z) = Number of protons = Number of electrons. Therefore, the atom has 11 electrons. The above question has given that the mass... View Article
The number of molecules per unit volume of a gas is much lower than compared to solids and liquids. therefore, gases have very low densities.... View Article
Oxygen is used for respiration in living organisms which reacts with food and release energy. Respiration is essential for the survival of... View Article
The frequency of the sound wave, n= 220 Hz Speed of the sound wave, v = 440 m/s For a sound wave, Speed = Wavelength x Frequency v = λ × n... View Article
During filtration, the solution collected at the bottom of the conical flask is called the filtrate. Filtration is a process that separates... View Article
The scattering of light by colloidal particles present in a colloidal solution is called the Tyndall effect. Tyndall effect was first described... View Article
The element having atomic number 20 is placed in the Group IIA and 4th period of the periodic table. The element is Calcium, Ca. The modern... View Article
The main source of water vapour is the burning of hydrocarbon which produces carbon dioxide and water vapour. Hydrocarbons are made up of... View Article
The main cause of acid rain is the formation of mineral acids like nitric acid and sulphuric acid Acid rain is one of the most dangerous... View Article
Fuels like coal, petrol, diesel and natural gas are burnt, carbon dioxide gas is released in large volumes. A chemical process in which a... View Article
The atomic mass of an element is the average mass of the atoms of an element measured in the atomic mass unit (amu, also known as Dalton, D). The... View Article
The frictional force is a force, which always opposes the motion of one body over the other body in contact with it. Frictional force always... View Article
The chemical reactions which proceed with the absorption of light energy are called photochemical reactions. A photochemical reaction is a... View Article
Electrolysis is a process by which electrical energy is used to produce a chemical change. The process of decomposition of an electrolyte into... View Article
This is the method used to prepare sodium oxide: 2NaNO3 + 10Na + Na2O + N2 Sodium nitrate when heated with sodium gives sodium oxide. 2NaNO2 +... View Article