हिंदी के किसी भी वाक्य में लिंग, वचन, कारक, संज्ञा, सर्वनाम , विशेषण, पुनरुक्ति और पदक्रम आदि से संबंधित गलतियों या अशुद्धियों को दूर कर शुद्ध वाक्य बनाना अशुद्ध वाक्यों का संशोधन कहलाता है। इन सभी की अशुद्धियों के कारण एक वाक्य का पुरान अर्थ नही निकल पाता है। इसके अर्थ में अनर्थ हो जाता […]
काल का अर्थ समय होता है, इसलिए क्रिया के जिस रूप से किसी काम के होने या उसके करने के समय का पता चलता है, उसे काल कहते है। जिससे कार्य समय का पता चले उस समय को काल कहते हैं। उदाहरण–: 1)सीता ने अपना कार्य कल पूरा कर दिया था। 2) सीमा अभी खेलने […]
Introduction In the Friedel-Crafts reaction, an alkyl or acyl group swaps places with the hydrogen atom of an aromatic molecule to make a hydrocarbon or ketone. This is an example of an electrophilic substitution reaction. When an aromatic molecule is alkylated or acylated, an acid catalyst (Lewis acid) is present. This could be \(AlC{l_3}\), \(ZnC{l_3}\), […]
Introduction Distillation is an isolation technique used to separate two miscible or immiscible liquids. This is based on the principle of boiling points of the components of the liquid mixture. It has been used since ancient times to make oils, alcohol, beverages, etc. The distillation process has now been industrialised and made faster and more […]
Introduction The electron (e-) is a particle of an atom, just as an atom is a substructure of matter. There is no way to create or destroy these atoms. Atoms were assumed to be the smallest unit of a particle before the discovery of electrons (e-). Tests used in the discovery of the electron shed […]
Introduction John Dalton, an English philosopher and scientist, established the atomic notion in 1808 as part of his investigation of the molecular structure of matter. It asserted that everything is made up of atoms, which are supposedly tiny autonomous creatures. According to Dalton’s atomic theory, the constituent parts of these substances are atoms that cannot […]
Introduction When a phone is hooked to its charger, how does the battery work? How does the cell in a TV remote control work? All of these questions have been thoroughly explored in the scientific discipline of electrochemistry. Electrochemistry is the study of both the creation of electricity through chemical processes and the use of […]
Introduction There is no such thing as an ideal gas in the real world; hence, the term “ideal gas” is strictly a theoretical one. An ideal gas is made up of several independently spinning, point-like particles that do not collide with one another in any way. Because it strictly adheres to the ideal gas law, […]
Introduction: An alteration in an atom’s energy is known as electron affinity. An atom gains a negative charge and releases energy as more electrons are added to its outer shell. In order to stabilise its octet, an element obtains electrons. When an element receives or loses an electron, energy is released. An exothermic reaction occurs […]