24/04/2026
*9th Class Chemistry*
*S/Qs + L/Qs*
*Ch. No. 01*
1. Define chemistry?
2. Why is there need to divide chemistry into many branches?
3. Branches of Chemistry? (S.Q + L.Q)
4. Differ b/w element, compound and mixture? (S.Q + L.Q)
5. Differ b/w homogeneous and heterogeneous mixture?
6. Define solution? Example
7. Define suspension? Example
8. Define colloidal solution?
9. Define unsaturated sol. Example?
10. Define a saturated solution. Example.
11. Exercise S/Qs (i, ii, vi, vii)
12. Construct Response Q. iii.
*Ch. No. 02 - Structure of Atom*
i) Write Greece concept of atom?
ii) Discovery of electron and properties?
iii) Discovery of proton and properties? (S.Q + L.Q)
iv) What is neutron? Who discovered it?
v) Define nucleus and extranuclear part?
vi) Write charge and mass of electron, proton, neutron?
vii) Bohr's Atomic model? (S.Q + L.Q)
viii) Define shell and subshell?
ix) How to calculate no. of electrons in a shell?
x) No. of electrons in subshells?
xi) Define Atomic No. and mass No. Examples?
xii) How to find no. of neutrons?
xiii) Sample example ⁵⁶Ba?
xiv) Define Relative atomic mass and amu?
xv) Formula to calculate Relative atomic mass and Sample Example No. 1?
xvi) Short Question Exercise i, ii, iii?
xvii) Construct response i, ii, iii?
*Ch. No. 03*
i) Why do atoms form chemical bond?
ii) Define duplet and octet rule?
iii) Define chemical bond? Types
iv) Define electronic configuration?
v) Explain and define ionic bond? (S.Q + L.Q)
vi) Define covalent bond?
vii) Define single, double, triple covalent bond and draw examples? (S.Q + L.Q)
viii) Define polar and non-polar covalent bond?
ix) Define and explain co-ordinate covalent bond, Donor and acceptor? (S.Q + L.Q)
x) Define metallic bond?
xi) Properties of metal?
xii) Strength of metallic bond? Factors
xiii) Why metals are good conductor of heat and electricity?
xiv) How metals are drawn into sheets and wires?
xv) Uses of metals?
xvi) Electropositive character of metals?
xvii) Electronegative character of non-metals?
xviii) Define intermolecular forces?
xix) Define dipole-dipole attraction?
xx) Hydrogen Bonding? (S.Q + L.Q)
*Ch. No. 04*
1. Define stoichiometry? Write uses
2. Define chemical formula?
3. Define Empirical formula?
4. Define molecular formula. Example.
5. Sample Problem. Find M.F of CH?
6. Deduce molecular formula from structural formula. Sample problems?
7. Define Avogadro's No. Example?
8. Define mole and molar mass?
9. Define chemical equation, reactants and products?
10. Exercise S/Qs i, ii, iii, iv, v?
11. Construct Response Pg.65 Q. i, ii, iii?
*Ch. No. 05*
i) Define chemical and heat energy?
ii) Endothermic and exothermic Reaction?
iii) Differ energetics and thermodynamics?
iv) Define system, surrounding? Example.
v) Define enthalpy, standard enthalpy?
vi) How is enthalpy diff. from heat?
vii) How does a reaction take place?
viii) What is transition state?
ix) Energy profile diagram for endo- and exothermic reaction?
x) Role of catalyst in a chemical reaction?
xi) Define a catalyst? also fig. 5.6
xii) Define aerobic and anaerobic respiration?
xiii) Define glycolysis?
xiv) Write role of lipids and glycogen?
xv) Exercise S/Qs iii, iv, v?
xvi) Construct response Q. ii?
*Ch. No. 06*
i) What is a chemical Reaction?
ii) What are irreversible and reversible reactions?
iii) How does a reversible reaction goes to completion?
iv) What is copper sulphate pentahydrate?
v) What is cobalt chloride hexahydrate?
vi) What is chemical equilibrium?
vii) What is static and dynamic equilibrium?
*Ch. No. 07*
i) Properties of acids?
ii) Minerals and organic acid?
iii) Properties of bases?
iv) Metal oxides are basic in nature? Why.
v) Neutralization Reaction?
vi) Explain Arrhenius acids and bases? (S.Q + L.Q)
vii) Role of water?
viii) Mineral Acids are strong acids?
ix) Hyperacidity, Reasons, symptoms, treatment? (L.Q)
x) Bronsted-Lowry Concept? (S.Q + L.Q)
xi) Water is amphoteric compound? Why.
xii) Chemical prop. of acids? (S.Q + L.Q)
xiii) Chemical prop. of bases? (S.Q + L.Q)
xiv) Exercise S/Q no. (i, ii, iii, iv)
xv) Construct Response Q. i, ii, iv, v?
*Ch. No. 08*
i) Basis of modern periodic table?
ii) Define periods and groups?
iii) s, p, d, f-block elements?
iv) Similarities in chemical prop. of same group elements?
v) Atomic radius and trend? (S.Q + L.Q)
vi) Ionization Energy and trend? (S.Q + L.Q)
vii) Define electronegativity?
viii) Define electron affinity?
ix) Exercise S/Qs no. i to viii?
x) Construct Response Q. i, ii, iii, iv?
*Ch. No. 09*
i) Why elements of a group show similar chemical properties?
ii) What are alkali metals?
iii) How does group-1 elements react with water?
iv) Reaction with Cl2?
v) What are group-17 elements?
vi) Halogens? Name? Physical appearance?
vii) Oxidation, Reduction, oxidizing, reducing agents?
viii) Oxidizing power of halogens?
ix) Transition or d-block elements?
x) Haber Process?
xi) Use of platinum?
xii) Catalytic Converter?
xiii) What are noble gases?
xiv) Exercise S/Qs No. i, ii, iii, iv?
xv) Construct Response Q. i, ii, iii, iv, v?
*Ch. No. 10*
i) Define environmental chemistry?
ii) Define atmosphere?
iii) Major and minor constituents of atmosphere?
iv) Define air pollutant and ppm?
v) Name and formula of major air pollutants?
vi) Sources of air pollutants? (03 points)
vii) Smog?
viii) Pollutants and their harmful effects? (S.Q + L.Q)
ix) Acid rain, its formation, Father of acid rain and effects of acid rain? (S.Q + L.Q)
x) Exercise S/Q i, iv, v, Construct Response: i, ii?
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*Ch. No. 11*
i) Define organic chemistry?
ii) Define catenation?
iii) Define saturated compound?
iv) Define Hydrocarbon? Write its use
v) What is methane?
vi) What are alkanes? Formula?
vii) Name according to IUPAC?
viii) Cracking of Hydrocarbon?
ix) Reduction of alkenes/Hydrogenation?
x) Reduction of alkyl halides?
xi) Exercise S/Qs. i, ii, iv, v, vi, vii, ix, C.R, Q. i, ii, iii?
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