9th Class Chemistry Past Paper 2017
Note: Chemistry 1st Time Paper of 9th Class.
Group-I (Subjective) 48 Marks
Part– I
Q.2 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Write two applications of nuclear chemistry.
(ii) Define free radicals. Give two examples.
(iii) Who discovered the electron and proton?
(iv) What is the maximum capacity of a shell?
(v) What are the defects of Rutherford’s atomic model?
(vi) Define atomic radius. Give an example.
(vii) Why are elements called s and p block elements?
(viii) What do you mean by groups and periods in the periodic table?
Q.3 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Why are noble gases not reactive?
(ii) Why do atoms react?
(iii) Why does a covalent bond become polar?
(iv) Define hydrogen bonding.
(v) What is meant by the diffusion of gases?
(vi) State Charles’s law of gases.
(vii) Define amorphous solids with examples.
(viii) In which form does sulfur exist at 100°C?
Q.4 Write short answers to any FIVE (5) questions: (10 Marks)
(i) Define aqueous solution and give one example.
(ii) What is suspension?
(iii) What is a redox reaction? Give an example.
(iv) Define galvanizing process.
(v) Write the importance of non-metals.
(vi) Write two chemical properties of halogens.
(vii) Write two uses of gold.
(viii) What is meant by an electrolyte and a non-electrolyte? Give one example of each.
PART-II
Note: Attempt any TWO (2) questions.
Q.5
(a) Write any five branches of chemistry. (4 Marks)
(b) Give four differences between Rutherford’s and Bohr’s Atomic Theory. (5 Marks)
Q.6
(a) Write any five properties of metals. (4 Marks)
(b) Define and verify Boyle’s law with an example. (5 Marks)
Q.7
(a) What is solubility? Explain general principle of solubility. (4 Marks)
(b) Write a note on electrolytic refining of copper. (5 Marks)