12th Chemistry Chapter Wise Papers Unit No.5

12th Chemistry Chapter Wise Papers

Download 12th Chemistry Chapter Wise Papers Notes with MCQs, important Short questions and Long questions.

Chapter 5 Notes | Chemistry 2nd Year

In this Post you can read FSC 12th Chemistry Chapter Wise Papers Unit No.5 MCQs, Short Questions and important Long Questions collected from Past Papers of Fsc annual examination.

Halogen And Noble Gases

Q.No.1 A).      Each question has four possible answers. Select the correct answer and circled it.         

v  Which of the Halogen halide is the weakest Acid in solution       

(a) HF (b) HBr           

(c)HI   (d) HCl

v  Which Halogen will react spontaneously with “Au” to produce Au⁺³

(a)Br₂        (b) F₂

(c) I₂          (d) Cl₂

v  The Anhydride of HClO₄ is                                                      

(a) ClO₃                   (b) ClO₂                     

(c) Cl₂O₅                     (d) Cl₂O₇

v  Which halogen attack the skin, produces burns that heal slowly      

(a) F₂               (b) Br₂            

(c) Cl₂               (d) At

v  Which one of the Halogen exist in free form                          

(a) F₂   (b) Cl₂            

(c) I₂    (d) None

v  Which one of them is the correct formula of sodium per iodate      

(a) Na₂IO₄       (b)NaIO₄              

(c)NaIO₃         (d) Na₂IO₅

v  Which Halogen is used as disinfectant in swimming pool           

(a) I₂    (b) Cl₂            

(c) F₂   (d) Br₂

v  What is the formula of Sodium perxanate                              

(a) Na₄XeO₅    (b) Na₄XeO₆  

(c) Na₃XeO₅      (d) Na₄XeO₄

v  Which noble gas is 1/6500.0 the part of atmosphere              

(a) Ne  (b) Ar            

(c) Kr  (d) Xe

v  XeO₃ is prepared by the hydrolysis of                                     

(a) XeF₆           (b) XeF₅                     

(c) XeF₄           (d) XeF₇

B).       Give Short Answer of the following                                                                       

1.         Write two Methods for preparation of ClO₂ with equations

2.         Write disproportionation reaction of Cl₂ with NaOH at 15C^o.

3.         Why “HF” has high thermodynamic properties than other Halogen acids.

4.         What is available chlorine.

5.         Why iodine has metallic luster.

Q.No.2.                                                                                                                                  

(a)         Discuss the oxidizing properties of Halogens.

(b)       Write the preparation of Bleaching powder by Beckmann’s method.          

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• 12th Chemistry Chapter Wise Papers Unit No.1
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