CHEMISTRY CLASSES BY PRADEEP SHARMA

Dear students solve following MCQ based upon Redox reaction . Submit your Answers in comment section. 1. What will be the absolute oxidation number of  Cl  in Bleaching Powder –          a.  0 , 0                    b 1,1             c. +1 & -1              d. None of these                 2 .  What is the oxidation number of Br in the BrO 3 -  ion?         a.            -1       b.  1        c.    +5        d.   -5      e.  +7 3. What kind of reaction is Cl 2      à   Cl -  + ClO 2 -      (aside from unbalanced)?      a.   An oxidation                                b.  A reduction           c.   A  disproportionation           d.  An impossible reaction               e.    None of these 4. In the reaction HNO 2  + I -    à NO + I 2        what atoms are being  oxidized and reduced, respectively?      a.   O, I       b.   O, I         c.  I, N        d.  N, I        e.  N,  O 5. Oxidation number of  Sulphur  in H 2 SO 5  is –      a. 8            b.  6  

Extraction means separation of metal from its ore. Major process during extraction are - 1. Crushing & Pulverisation 2. Concentration 3. Oxidation 4. Reduction 5. Refining of Elements Video on following link explains the Entire Chapter for class 12 chemistry. Extraction for Class 12 , NEET & JEE . Click here https://unacademy.com/lesson/extraction-part-5in-hindi/HSDOPDJ4 #ChemistryVideo #FreeVideo #NEET #JEE #MockTest