CBSE Class 12 Commercial Art Compartment Question Paper 2020
SECTION A Instruction : Write answers for all the six parts of the given question by selecting the correct one from the given options. 1. (a) Mention the title of the painting made by painter Nuruddin from the following miniature-paintings of the Rajasthani School : (A)…
CBSE Class 12 Chemistry Compartment Question Paper Solved 2020 Set A
SECTION A Read the given passage and answer the question numbers 1 to 5 that follow : A large number of simple molecules called monomers combine together by the process of polymerisation to form a macromolecule called polymer. If the repeating structural unit is derived from…
CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set E
SECTION : A Read the given passage and answer the questions 1 to 5 that follow : The halogens have the smallest atomic radii in their respective periods. The atomic radius of fluorine is extremely small. All halogens exhibit – oxidation state. They are strong oxidising…
CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set D
SECTION – A Read the given passage and answer the questions 1 to 5 that follow : Colloidal particles always carry an electric charge which may be either positive or negative. For example, when AgNO3 solution is added to KI solution, a negatively charged colloidal sol is…
CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set C
SECTION A Read the given passage and answer the questions number 1 to 5 that follow : The d-block of the periodic table contains the elements of the groups 3 – 12 and are known as transition elements. In general, the electronic configuration of these elements is (n – 1) d1–10…
CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set B
SECTION A CHEMISTRY Read the given passage and answer the questions number 1 to 5 that follow : Organic compounds containing amine as functional group are present in a vivid variety of compounds, namely amino acids, hormones, neurotransmitters, DNA, alkaloids, dyes, etc.…
CBSE Class 12 Chemistry Boards 2020 Question Paper Solved Set A
SECTION A Read the given passage and answer the questions number 1 to 5 that follow : The substitution reaction of alkyl halide mainly occurs by SN1 or SN2 mechanism. Whatever mechanism alkyl halides follow for the substitution reaction to occur, the polarity of the carbon…
NCERT Book Class 12 Chemistry Answers and Solutions
Click on the below link to download NCERT Class 12 Chemistry Answers and Solutions
CBSE Class 12 Chemistry Chemical Kinetics Online Test Set B
Refer to CBSE Class 12 Chemistry Chemical Kinetics Online Test Set B below. Students of Class 12 can refer to the full list of free Class 12 Chemistry Mock Test provided by StudiesToday. These MCQ based online mock tests for Chemistry in Grade 12 has been designed based on the…
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…