Archive | Science

The difference between Chloride ion and Chlorine atom are Chloride ion (CI-) has a stable electronic configuration of (2, 8, and 8) of argon with 8 electrons in its outermost shell) whereas…..

The major limitations or disadvantages of a steam engine or external combustion engine are a steam engine is huge and heavy. (That is, An external combustion engine is huge and heavy). Due to its big boiler and furnace a steam engine is huge, heavy and clumsy. Since the boiler of a steam engine is very […]

The main postulates of Dalton’s Atomic theory are atoms of the same substance are identical in all respects, i.e. they possess same size, shape, mass and chemical properties, etc….

The difference between Electrovalent and Covalent compounds are Electrovalent compounds are formed by complete transfer of electrons in KCI whereas Covalent compounds are formed by…

There are two forces operating inside the nucleus of an atom : the electrostatic force which causes the repulsion between various protons and tends to make the nucleus unstable, and…

The characteristics of Protons, Electrons and Neutrons are proton is a positively charged particle having an absolute charge of + 1.6 x 10-19 coulombs. Since this is the smallest positive charge carried by a particle, so this is taken as the unit of positive charge…

The main advantages of an internal combustion engine over the external combustion engine are an internal combustion engine (or petrol engine) is smaller and lighter. On the other hand, an external combustion engine (or steam engine) is big and heavy….

Lien is a right which the law gives to certain persons in specified circumstances to refuse to deliver property belonging to others, till those others have discharged their legal obligations to them. Liens are of three kinds…

A special case arises under sec.39 when an integral part of a contract is repudiated by a promisor, before the due date of performance has arrived. This is called an “Anticipatory breach of contract”. In such a case two remedies…

Vector borne diseases: – Vector is defined as any living carrier that transports and infectious agent to ma susceptible individual (man). Transmission by vector may be mechanical or biological.

We live on earth in different types of surroundings. This surrounding is our environment. We eat, breathe, clothe ourselves, reproduce and then die. The next generation comes and the cycle goes on; and the human race flourishes on earth.

Mendeleev’s periodic table was based on atomic weight. In 1913, Moseley from his studies on X-rays found that the atomic number is the more fundamental property of an element than its atomic mass. Thus, atomic number was adopted as the basis of modern periodic table…

The difference between boiling and evaporation are boiling occurs at a given temperature called the boiling point of the liquid under a given pressure whereas evaporation takes place at all temperatures…

The potential energy of a body is due to its higher position above the earth and it is equal to the work done on the body, against gravity, in moving the body to that position. So, to find out the….

The outermost shell of an atom is known as the valence shell. The electrons present in the valence shell of an atom are known as the valence electrons. The remainder of the atom—the nucleus and…

Air is a mixture because the properties of the constituents of air (oxygen, nitrogen, carbon dioxide etc.) are not changed. For example, pure oxygen is a supporter of combustion. Oxygen present in air also supports combustion…