In this article, we shall study the types of chemical reactions. Before understanding the types of chemical reactions, let us study the meaning of the terms “a physical change” and “a chemical change” Physical Change: A change in which only the physical properties of a substance are changed is called a physical change. In a […]
Category: Chemistry
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Reactions of Alkenes
In the last article, we have studied methods of preparation of alkenes. In this article, we shall study the reactions of alkenes Stability of Alkenes: The stability of alkenes is measured in terms of its heat of hydrogenation. The heat of hydrogenation of an alkene is defined as the amount of heat evolved when one […]
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Preparation of Alkenes
In the last article, we have studied what are alkenes and isomerism in them. In this article, we shall study different methods of preparation of alkenes. Preparation of Alkenes By Dehydration of Alcohols: Alcohols on heating in the presence of dehydrating agents Iike concentrated sulphuric acid or phosphorous pentoxide or anhydrous alumina etc. undergoes a loss […]
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Alkenes: Introduction
In this article, we shall learn about alkanes, isomerism in alkenes. Compounds containing carbon and hydrogen only are called hydrocarbons. Examples: Methane (CH4), Ethane (C2H6), Benzene (C6H6), etc. Aliphatic Hydrocarbons: The hydrocarbons in which carbon atoms are joined form an open chain are called aliphatic hydrocarbons. Examples: Methane (CH4), Ethane (C2H6), etc. Aliphatic hydrocarbons are […]
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Alkanes
In this article, we shall learn about alkanes, isomerism in alkanes. Compounds containing carbon and hydrogen only are called hydrocarbons. Examples: Methane (CH4), Ethane (C2H6), Benzene (C6H6), etc. Aliphatic Hydrocarbons: The hydrocarbons in which carbon atoms are joined form an open chain are called aliphatic hydrocarbons. Examples: Methane (CH4), Ethane (C2H6), etc. Aliphatic hydrocarbons are […]
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Nuclear Reactions
In this article, we shall study different types of nuclear reactions. Nuclear Reactions: A reaction in which there is a change in the composition of the nucleus is called a nuclear reaction. Characteristics of Nuclear Reactions: There is a change in the composition of the nucleus. In nuclear reaction rearrangement of nucleons ( constituents of […]
Isotopes are different atoms of the same elements having the same atomic number but a different mass number. Isotopes of radioactive elements are found to be very useful in different fields like carbon dating, agriculture, medicines, the production of synthetic elements, etc. Important uses of radioisotopes are as follows. Estimation of Age of Rock and […]
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Nuclear Stability
The nucleus of an atom is extremely small. The radius of the nucleus is about 10-15 m. In such a small place protons and neutrons are held together. Protons are positively charged so they should get repelled however the majority of the nuclei are stable hence there must be certain factors which affect nuclear stability. Some […]
Researches by J.J. Thomson, Dalton, Rutherford, and Mosley showed that an atom is the smallest but not the ultimate particle of the matter. An atom consists of subatomic particles, protons, neutrons, and electrons called fundamental particles. Besides these, particles like mesons, positrons, neutrinos are also associated with the atomic structure. In this article, we shall […]
Science > Chemistry > Introduction to Organic Chemistry > Chemistry of Carbon Compounds Organic chemistry is a branch of chemistry, which studies carbon compounds. Organic substances are substances derived from organisms like plants and animals. In the olden days it was assumed that these substances cannot be prepared in laboratories. Berzelius assumed that some vital […]