Science GK Quiz with Answers

In chemistry, the molar mass of a chemical compound is equal to the ratio of the mass of a sample of that compound and the amount (in moles) of the substance present in that sample. Its SI unit is kilogram/mol. But gram/mol is its practical unit.

However, to show the law of conservation of mass in an equation, the chemical equation must be completely balanced. Using coefficients to create a balanced chemical equation equals the number of each type of atom in the reaction on each side of the equation.

The word 'atom' originates from the Greek language, in which atomio means 'uncutable' or 'indivisible'.

The SI unit of frequency is Hertz, which is represented by the symbol Hz. It is named after Heinrich Hertz, the German physicist who discovered electromagnetic radiation.

Saturated hydrocarbons burn with a blue flame and unsaturated hydrocarbons burn with a sooty flame.

Quantum mechanics was developed keeping in mind the dual behavior of matter. Quantum mechanics is a theoretical science, in which the motions of those microscopic objects are studied, which show the properties of both waves and particles. It determines the laws of motion of such objects.

Born's law states that the probability density of finding a particle at a particular state is proportional to the square of the modulus of the wave function at that point.

Key Features of the Aufbau PrincipleAccording to the Aufbau principle, electrons first occupy the lowest energy orbitals. This indicates that electrons enter higher-energy orbitals only when the lower-energy orbitals are completely occupied.

Maxwell showed for the first time that light waves are related to oscillating electric and magnetic behavior.

Proust had expressed this law in this way, “The elements in any compound are always present in the ratio of definite masses”. He was born in a family. At the age of twelve, he started his career as a teacher. Seven years later he became principal of a John Dalton school.