Unit - 1 Basic Concepts of Chemistry and Chemical Calculations · Part 10

→ ( ) × 3e – 1e – K Cr O + 6KI → H SO K SO Cr SO ( ) I H O K Cr O KI H SO K Cr O KI → → K SO H O Cr Cr (SO ) +3I 7H SO 4K SO ( ) SO I + 7H O 11th Std Chemistry 11th Std Chemistry - - - - (ii) KMnO Na S O MnO Na S O KOH →  3e – 2e – ⇒ →  ⇒ →  2KMnO + 3Na SO 2MnO + MnO Na SO KOH KMnO Na SO Na SO + KOH ⇒ →  KMnO Na SO MnO Na SO H O 2KOH (iii) 2e – 1e – Cu HNO C u NO N o H O →  ( ) Cu + 2HNO 2HNO 2NO →  →  Cu NO NO H O Cu HNO Cu NO ( ) ( ) H O Cu HNO Cu NO NO H O →  ( ) (iv) 5e – 1e – × KMnO H C O H SO K SO MnSO CO H O →  2KMnO + 5H C O + →  H SO K SO MnSO CO H O KMnO H C O H SO K SO H O KMnO H C O H SO K SO →  →  2MnSO +10CO MnSO CO H O 11th Std Chemistry 11th Std Chemistry - - - - . (i) Half reaction are MnO Mn Sn Sn →  →  ............. ( ) and ............. ( ) ( ) ( ) MnO H e Mn H O Sn Sn e MnO H e Mn H O Sn Sn 0e ⇒ →  MnO Sn H