CBSE Class 12 Chemistry Surface Chemistry Board Exam Notes
KEY POINTS • The branch of chemistry which deals with the study of surface phenomena . • Adsorption:The phenomenon of attracting and retaining the molecules of a substance at the surface of the solid or a liquid resulting into higher concentration of the molecules on the…
CBSE Class 12 Chemistry Solutions Board Exam Notes
SOLUTION is the homogeneous mixture of two or more than two components. Most of the solutions are binary i.e. consists of two components out of which that is present in the largest quantity is called solvent & one which is present in smaller quantity called solute. …
CBSE Class 12 Chemistry Polymers Board Exam Notes
KEY POINTS Polymer: It is a very large molecule having high molecular mass (103 ‐ 107 u). They are formed by joining of repeating structural units on large scale. Copolymer is derived from more than one species of monomer. Copolymer is fromed by copolymerization of two…
CBSE Class 12 Chemistry P Block Elements Board Exam Notes
The general valence shell electronic configuration of p‐block elements ‐ ns2 np1–6 Group‐16thELEMENTS KEY POINTS :‐ 1. O, S, Se, Te and Po are present in G‐16th Their general electronic conf. of last shell is ns2,np4. 2. Atomic and ionic radii increases down the group…
CBSE Class 12 Chemistry Haloalkanes And Haloarenes Board Exam Notes
The placement of hydrogen atom(s) in a hydrocarbon, aliphatic or aromatic, by halogen atom(s) results in the formation of alkylhalide (haloalkane) and arylhalide (haloarene), respectively (A) IMPORTANT NAME REACTIONS (B) IMPORTANT MECHANISMi) Nucleophilic Substitution…
CBSE Class 12 Chemistry General Principles And Process Of Isolation Of Elements Board Exam Notes
VERY SHORT ANSWER TYPE QUESTION(1 mark)A.1. It is easily fusible material, which is formed when gangue still present in roasted ore combines with the flux. e.g. CaO (flux) + SiO2 (gangue) → CaSiO3 (slag)Q.2.Name the metals which can be refined by zone refining.A3.…
CBSE Class 12 Chemistry Electrochemistry Board Exam Notes
KEY POINTS Resistance – obstacle to the flow of electricity. Resistivity – resistance offered by the conductor when it is of unit length and has unit area of cross section. Conductivity – conductance of the ions present in 1 cubic centimeter solution. It is the reciprocal…
CBSE Class 12 Chemistry D And F Block Elements Board Exam Notes
• d‐block consists of elements belonging to group 3‐12. • The general electronic configuration of these elements in (n‐1) d1–10 ns1–2. They contain unpaired d - electron either in elementary or most commonly occurring oxidation state. • Transition elements exhibits metallic…
CBSE Class 12 Chemistry Coordination Compounds Board Exam Notes
Difference between coordination compound and double salt: Werner's coordination theory: Werner was able to explain the nature of bonding in complexes. The postulates of Werner's theory are: a. Metal shows two different kinds of valencies: primary valency and secondary…
CBSE Class 12 Chemistry Chemistry In Everyday Life Board Exam Notes
KEY CONCEPTS 1. DRUGS‐ Drugs are chemical of low molecular masses, which interact with macromolecular targets and produces a biological response. 2. CHEMOTHERAPY‐ The use of chemicals for therapeutic effect is called chemotherapy. 3. CLASSIFICATION OF DRUGS a) ON THE…
CBSE Class 12 Chemistry Chemical Kinetics Board Exam Notes
KEY CONCEPTS This is differential rate equation.Order of reaction:‐ For the reaction a A + b B → c C + d D Rate = K[A]x [B]yx + y = order of reaction (where x & y may or may not be equal to stoichiometric coefficient)Note:‐i. if x + y = 1, reaction is called I order…
CBSE Class 12 Chemistry Biomolecules Board Exam Notes
BIOMOLECULES QUESTIONSVSA TYPE QUESTIONS (1 - MARK QUESTIONS)1. How many asymmetric carbon atoms are present in D (+) glucose?2. Give the significance of (+)-sign in the name D- (+)-glucose.3. Give the significance of prefix ‘D’ in the name D- (+)-glucose.4. Why is…
CBSE Class 12 Chemistry Amines Board Exam Notes
Classification: Amines are classified according to the number of carbon atoms bonded directly to the nitrogen atom. A primary (1°) amine has one alkyl (or aryl) group on the nitrogen atom, a secondary (2°) amine has two, and a tertiary (3°) amine has three. Physical…
CBSE Class 12 Chemistry Aldehydes Ketones And Carboxylic Acids Board Exam Notes
♦ Form aldehyde cannot be prepared by Rosenmund's reaction since formyl chloride is unstable at room temperature. VERY SHORT ANSWER TYPE QUESTIONS Q 1. Arrange the following compounds in an increasing order of their reactivity towards nucleophilic addition reaction. Q2…
CBSE Class 12 Chemistry Alcohols Phenols And Ethers Board Exam Notes
Definition: An alcohol is any organic compound in which a hydroxyl functional group is bound to a carbon atom, usually connected to other carbon or hydrogen atoms. MIND MAP OF PROPERTIES OF ALCOHOL Physical Properties 3. Oxidation of Alcohols: (1°), (2…