Solved papers for NEET Chemistry Redox Reactions / रेडॉक्स अभिक्रियाएँ NEET PYQ-Redox Reactions

done NEET PYQ-Redox Reactions Total Questions - 16

• question_answer1) Oxidation state of Fe in \[F{{e}_{3}}{{O}_{4}}\]is:                                                          [AIPMT 1999]
  A)
  \[\frac{3}{2}\]  
  done clear
  B)
                    \[\frac{4}{5}\] 
  done clear
  C)
   \[\frac{5}{4}\] 
  done clear
  D)
                    \[\frac{8}{3}\]
  done clear
  View Answer play_arrow

• question_answer2) In which of the following compounds transition metal has zero oxidation state?                       [AIPMT 1999]
  A)
   \[[Fe{{(CO)}_{5}}]\]
  done clear
  B)
        \[N{{H}_{2}}.N{{H}_{2}}\]
  done clear
  C)
   \[NOCl{{O}_{4}}\]
  done clear
  D)
               \[Cr{{O}_{5}}\]        
  done clear
  View Answer play_arrow

• question_answer3) A compound contains atoms of three elements A, B and C. If the oxidation number of A is +2, B is +5, and that of C is -2, the possible formula of the compound is:                                                                              [AIPMT 2000]
  A)
  \[{{A}_{2}}{{(B{{C}_{3}})}_{2}}\]
  done clear
  B)
                    \[{{A}_{3}}{{(B{{C}_{4}})}_{2}}\]
  done clear
  C)
   \[{{A}_{3}}{{({{B}_{4}}C)}_{2}}\]
  done clear
  D)
                    \[AB{{C}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer4) The oxidation states of sulphur in the anions \[SO_{3}^{2-},\,{{S}_{2}}O_{4}^{2-}\] and \[{{S}_{2}}O_{6}^{2-}\] follow the order:                                                                                                              [AIPMT 2003]
  A)
   \[{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}<SO_{3}^{2-}\]
  done clear
  B)
   \[{{S}_{2}}O_{6}^{2-}<{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}\]
  done clear
  C)
   \[{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}<{{S}_{2}}O_{6}^{2-}\]
  done clear
  D)
   \[SO_{3}^{2-}<{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer5) Oxidation numbers of P in \[PO_{3}^{4-}\] of S in  \[SO_{3}^{2-}\] and that of Cr in \[C{{r}_{2}}O_{7}^{2-}\] are respectively,                                                                                                       [AIPMT (S) 2009]
  A)
  +5, +6 and +6
  done clear
  B)
   +3, +6 and +5
  done clear
  C)
   +5, +3 and +6
  done clear
  D)
        -3, +6 and +6
  done clear
  View Answer play_arrow

• question_answer6) Oxidation states of P in \[{{H}_{4}}{{P}_{2}}{{O}_{5}},\,{{H}_{4}}{{P}_{2}}{{O}_{6}},\]\[{{H}_{4}}{{P}_{2}}{{O}_{7}},\] are respectively                                                                                                         [AIPMT (S) 2010]
  A)
                                           + 3, + 5, + 4    
  done clear
  B)
        + 5, + 3, + 4
  done clear
  C)
   + 5, + 4, + 3    
  done clear
  D)
        + 3, + 4, + 5
  done clear
  View Answer play_arrow

• question_answer7) In which of the following compounds, nitrogen exhibits highest oxidation state?                                   [AIPMT (S) 2012]
  A)
   \[{{N}_{2}}{{H}_{4}}\]         
  done clear
  B)
        \[N{{H}_{3}}\]
  done clear
  C)
   \[{{N}_{3}}H\]
  done clear
  D)
        \[N{{H}_{2}}OH\]
  done clear
  View Answer play_arrow

• question_answer8) When \[0.1\,\,mol\,\,MnO_{4}^{2-}\] is oxidised, the quantity of electricity required to completely oxidise \[MnO_{4}^{2-}\] is \[MnO_{4}^{-}\]                                                                                           [AIPMT 2014]
  A)
   96500 C      
  done clear
  B)
    \[2\times 96500\,C\]
  done clear
  C)
   9650 C        
  done clear
  D)
    96.50 C
  done clear
  View Answer play_arrow

• question_answer9) The pair of compounds that can exist together is                                                              [AIPMT 2014]
  A)
   \[FeC{{l}_{3}},SnC{{l}_{2}}\]            
  done clear
  B)
   \[HgC{{l}_{2}},SnC{{l}_{2}}\]
  done clear
  C)
   \[FeC{{l}_{2}},SnC{{l}_{2}}\]      
  done clear
  D)
        \[FeC{{l}_{3}},Kl\]
  done clear
  View Answer play_arrow

• question_answer10) In acidic medium, \[{{H}_{2}}{{O}_{2}}\] changes \[C{{r}_{2}}O_{7}^{2-}\] to \[Cr{{O}_{5}}\] which has two \[(OO)\] bonds. Oxidation state of Cr in \[Cr{{O}_{5}}\] is                                                             [AIPMT 2014]
  A)
   + 5     
  done clear
  B)
   +3
  done clear
  C)
                    + 6            
  done clear
  D)
   - 10
  done clear
  View Answer play_arrow

• question_answer11) 

  (I) \[{{H}_{2}}{{O}_{2}}\,+{{O}_{3}}\,\xrightarrow{\,}\,{{H}_{2}}O\,+2{{O}_{2}}\]

  (II) \[{{H}_{2}}{{O}_{2}}+A{{g}_{2}}O\to 2Ag+{{H}_{2}}O+{{O}_{2}}\]

  Role of hydrogen peroxide in the above reactions is respectively                                                   [AIPMT 2014]

  A)
   oxidising in (I) and reducing in (II)
  done clear
  B)
   reducing in (I) and oxidizing in (II)
  done clear
  C)
   reducing in (I) and (II)
  done clear
  D)
   oxidising in (I) and (II)
  done clear
  View Answer play_arrow

• question_answer12) Which of the following processes does not involve oxidation of iron?                         [NEET 2015]
  A)
   Rusting of iron sheets
  done clear
  B)
   Decolourisation of blue \[CuS{{O}_{4}}\] solution by iron
  done clear
  C)
   Formation of \[Fe{{(CO)}_{5}}\] from Fe

  done clear D)  Liberation of Hg from steam by iron a high temperature done clear View Answer play_arrow question_answer13) The correct order of N-compounds in its decreasing order of oxidation states is                     [NEET - 2018] A)  \[\text{HN}{{\text{O}}_{\text{3}}}\text{,N}{{\text{H}}_{\text{4}}}\text{Cl,NO,}{{\text{N}}_{\text{2}}}\] done clear B)  \[\text{HN}{{\text{O}}_{\text{3}}}\text{,NO,N}{{\text{H}}_{\text{4}}}\text{Cl,}{{\text{N}}_{\text{2}}}\] done clear C)  \[\text{HN}{{\text{O}}_{\text{3}}}\text{,NO,}{{\text{N}}_{\text{2}}}\text{,N}{{\text{H}}_{\text{4}}}\text{Cl}\] done clear D)  \[\text{N}{{\text{H}}_{\text{4}}}\text{Cl,}{{\text{N}}_{\text{2}}}\text{,NO,HN}{{\text{O}}_{\text{3}}}\] done clear View Answer play_arrow question_answer14) The correction factor 'a' to the ideal gas equation corresponds to                                 [NEET - 2018] A)  Electric field present between the gas molecules done clear B)  Volume of the gas molecules done clear C)  Density of the gas molecules done clear D)  Forces of attraction between the gas molecules done clear View Answer play_arrow question_answer15)  Which of the following reactions are disproportionation reaction?                                     [NEET 2019] (i) \[2C{{u}^{+}}\to C{{u}^{2}}+C{{u}^{0}}\] (ii) \[3MnO_{4}^{2+}+4{{H}^{+}}\to 2MnO_{_{4}}^{-}+Mn{{O}_{2}}\] \[+2{{H}_{2}}O\] (iii) \[2KMn{{O}_{4}}\xrightarrow{\Delta }{{K}_{2}}Mn{{O}_{4}}+Mn{{O}_{2}}\] \[+{{O}_{2}}\] (iv) \[2MnO_{4}^{-}+3M{{n}^{2+}}+2{{H}_{2}}O\to 5Mn{{O}_{2}}\] \[+4{{H}^{\oplus }}\] Select the correct option from the following: A)  (i), (iii) and (iv) done clear B)       (i) and (iv) only done clear C)  (i) and (ii) only done clear D)       (i), (ii) and (iii) done clear View Answer play_arrow question_answer16) What is the change in oxidation number of carbon in the following reaction?                           [NEET 2020] \[C{{H}_{4}}(g)+4C{{l}_{2}}(g)\to CC{{l}_{4}}(l)+4HCl(g)\] A)  0 to + 4           done clear B)       - 4 to + 4 done clear C)  0 to - 4 done clear D)       + 4 to + 4 done clear View Answer play_arrow Study Package NEET PYQ-Redox Reactions   Buy Now     Please Wait you are being redirected.... You need to login to perform this action. You will be redirected in 3 sec × Reset Password. Email : Send Password Cancel Add Mobile Enter Mobile Number Submit Logout Enter OTP OTP has been sent to your mobile number and is valid for one hour Enter One Time Password Submit Change Mobile: Submit Logout Mobile Number Verified Your mobile number is verified. Close Free Videos × For free video lectures fill in the form below and we will get back to you. * Email Address: * Mobile Number: Submit Cancel