9th Class Chemistry Past Paper 2016 Evening
Note: Chemistry 2nd Time Paper of 9th Class.
Group-II (Subjective) 48 Marks
Part– I
Q.2 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Define biochemistry.
(ii) Define valency with an example.
(iii) Write down two properties of positive rays.
(iv) Differentiate between shells and sub-shells.
(v) Define isotopes with an example.
(vi) Define Mendeleev’s periodic law.
(vii) Differentiate between periods and groups.
(viii) Define shielding effect.
Q.2 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Briefly describe the ionic bond.
(ii) Differentiate between polar and non-polar covalent bonds.
(iii) Why does ice float on water?
(iv) Write two properties of covalent compounds.
(v) What do you mean by standard atmospheric pressure?
(vi) Define vapour pressure.
(vii) Distinguish between amorphous solid and crystalline solid.
(viii) What is meant by transition temperature?
Q.2 Write short answers to any FIVE (5) questions: (10 Marks)
(i) What is the difference between solute and solvent?
(ii) How is a one molar solution prepared?
(iii) What is the difference between anode and cathode?
(iv) What are non-electrolytes? Give an example.
(v) What are redox reactions?
(vi) Write any two chemical properties of halogens.
(vii) Write the names or symbols of any four noble gases.
(viii) Write any two uses of sodium.
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) Write any five characteristics of a mixture. (5 Marks)
(b) What is the difference between Rutherford’s and Bohr’s Atomic Theory? (4 Marks)
Q.6
(a) Define an ionic bond and explain different steps in the formation of NaCl. (5 Marks)
(b) Define Boyle’s law and write its experimental verification. (4 Marks)
Q.7
(a) Define solubility and describe the effects of temperature on solubility. (5 Marks)
(b) Describe oxidation and reduction in terms of loss or gain of electrons. (4 Marks)