YSA Model Paper 

 Class: 9                                                                Subject: Chemistry

Total Marks:  65 

SECTION - C

[20]

 

Note: Attempt any two questions

 

Q No. 1     a) What is coordinate covalent bond? Explain the formation of NH₄⁺ ammonium       ion                                                                                                        [2+3]

      b) What are the properties of Metals                                                          [4]

      c)  Strength of metallic bond depends upon what factors                            [1]

 

Q No. 2     a) What are postulates of Ionic theory                                                    [6]

                  b)  Explain electrolysis of Fused sodium chloride                                        [4]

Q No. 3     a) What are properties of Bases                                                              [3]

                  b) Draw Flow-sheet diagram of Solvay ammonia process                              [3]

                  c) What is formula of Potash Alum and how Potash alum is formed   [1+3]

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