XI Unit IV: Chemical Bonding and Molecular Structure

Valence electrons, ionic bond, covalent bond; bond parameters, Lewis structure, polar character of covalent bond, covalent character of ionic bond, valence bond theory, resonance, geometry of covalent molecules, VSEPR theory, concept of hybridization, involving s,p and d orbitals and shapes of some simple molecules, molecular orbital theory of homonuclear diatomic molecules (qualitative idea only), hydrogen bond.

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Study Material:

NCERT   NIOS

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Previous year question:

• CBSE
• BSEB
• Maharashtra Higher Secondary Education
• Uttar Pradesh Madhyamik Shiksha Parishad
• WBCHSE
• Directorate of Government Examinations Tamil Nadu
• Board of Secondary Education, Madhya Pradesh
• Karnataka Department of Pre-University Education
• JEE
• NEET
•  

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ANIMATIONS 

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Online MCQ Test 

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XI Unit III: Classification of Elements and Periodicity in Properties

Significance of classification, brief history of the development of periodic table, modern periodic law and the present form of periodic table, periodic trends in properties of elements -atomic radii, ionic radii, inert gas radii Ionization enthalpy, electron gain enthalpy, electronegativity, valency. Nomenclature of elements with atomic number greater than 100.

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Study Material:

NCERT   NIOS

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Previous year question:

• CBSE
• BSEB
• Maharashtra Higher Secondary Education
• Uttar Pradesh Madhyamik Shiksha Parishad
• WBCHSE
• Directorate of Government Examinations Tamil Nadu
• Board of Secondary Education, Madhya Pradesh
• Karnataka Department of Pre-University Education
• JEE
• NEET
•  

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ANIMATIONS 

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Online MCQ Test 

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XI Unit II: Structure of Atom

Discovery of Electron, Proton and Neutron, atomic number, isotopes and isobars. Thomson's model and its limitations. Rutherford's model and its limitations, Bohr's model and its limitations, concept of shells and subshells, dual nature of matter and light, de Broglie's relationship, Heisenberg uncertainty principle, concept of orbitals, quantum numbers, shapes of s, p and d orbitals, rules for filling electrons in orbitals - Aufbau principle, Pauli's exclusion principle and Hund's rule, electronic configuration of atoms, stability of half filled and completely filled orbitals.

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Study Material:

NCERT   NIOS

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Previous year question:

• CBSE
• BSEB
• Maharashtra Higher Secondary Education
• Uttar Pradesh Madhyamik Shiksha Parishad
• WBCHSE
• Directorate of Government Examinations Tamil Nadu
• Board of Secondary Education, Madhya Pradesh
• Karnataka Department of Pre-University Education
• JEE
• NEET
•  

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ANIMATIONS 

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Online MCQ Test 

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Unit I: Some Basic Concepts of Chemistry

Syllabus:

General Introduction: Importance and scope of chemistry.

Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules.

Atomic and molecular masses, mole concept and molar mass, percentage composition, empirical and molecular formula, chemical reactions, stoichiometry and calculations based on stoichiometry.

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Study Material:

NCERT   NIOS

................................................................................................................................................................

Previous year question:

• CBSE
• BSEB
• Maharashtra Higher Secondary Education
• Uttar Pradesh Madhyamik Shiksha Parishad
• WBCHSE
• Directorate of Government Examinations Tamil Nadu
• Board of Secondary Education, Madhya Pradesh
• Karnataka Department of Pre-University Education
• JEE
• NEET
• 
  
  

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ANIMATIONS 

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Online MCQ Test 

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education system of usa

There is considerable variability in the exact arrangement of grades, as the following table indicates.

General level (or category)				Level	Student age range (at the beginning of academic year)
Preschool				Pre-kindergarten	3–5
Compulsory education
Elementary school				Kindergarten	5–6
				1st grade	6–7
				2nd grade	7–8
				3rd grade	8–9
				4th grade	9–10
				5th grade	10–11
Middle school				6th grade	11–12
		Junior high school		7th grade	12–13
				8th grade	13–14
High school				Freshman/9th grade	14–15
		Senior high school		Sophomore/10th grade	15–16
				Junior/11th grade	16–17
				Senior/12th grade	17–18
Higher education
College (University)		Undergraduate school		First year: "freshman year"	18–19
				Second year: "sophomore year"	19–20
				Third year: "junior year"	20–21
				Fourth year: "senior year"	21–22
Graduate school (with various degrees and curricular partitions thereof)					Ages vary
Continuing education
Vocational school					Ages vary