Limiting reactant means the substance which gets completely consumed during the chemical reaction . Excess reactant means the substance which remains during the chemical reaction. Following video will help you understanding the limiting reactant.
d Block elements are those in which last electron enters in d subshell . Transition elements are those which possess partially filled d-subshell. Notes - Students can download #Notes of d&F-block from following Link -
In case of organic reaction , mechanism is the key of success . Organic reactions are of three types - (a) Addition Reaction (b) Substitution Reaction (c) Elimination Reactions All the above mentioned reaction involve the use of Electrophile & Nucleophiles. In most of the "electrophilic" reaction we get unexpected Products. Lets understand the formation of Unexpected Products by " Carbocation rearrangement ". Note - Following Video explains all about carbocation rearrangements -
Lots of questions in organic chemistry comes from the reasoning section. Each and every chapter of organic chemistry possess large number of reasoning questions. Answer of most of the question is based on resonance and inductive effect. A student must have prior knowledge of resonance and inductive effect to solve all the problems correctly. In case of halo alkanes and halo airings most of the questions comes from reactivity. Answers of all these questions are based upon resonating structure and partial double bond. In case of alcohols and phenols most of the questions are from acidic strength. Again strong knowledge of resonance and resonating structure can help in solving such type of questions. In case of aldehydes and ketones most of the questions are based on reactivity and the answer of these questions are based upon inductive effect. In case of a Amines maximum questions appears from basic strength and the answer in wall both residents as well as inductive effect...
Reduction Means addition of Hydrogen or removal of oxygen . Reducing agent is a substance used to supply hydrogen to other substance . In organic chemistry lots of reducing agents are used , bUt main reducing agents are , Ni/Hydrogen , lithium aluminium hydride etc. Note - Following video will explains basic process of reduction -
Existence of a molecule in more than one structure is called as Resonance. None of contributing structure is actual structure but actual structure is the hybrid of all the structure. Types of Resonance - (a) Pi-Bond resonance or Mesomeric effect (b) sigma bond resonance or Hyper conjugation . Condition - (a) Planer Molecule (b) Conjugation ........contd.. Note - Following video will be helpful for Understanding the concept of resonance