Redox Reaction (Advanced) - Practice Sheet, Class 11, Chemistry JEE Notes | EduRev

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JEE : Redox Reaction (Advanced) - Practice Sheet, Class 11, Chemistry JEE Notes | EduRev

 Page 1


LEARNERS HABITAT
1] The number of moles of KMnO
4
 required to oxidise one mole of ferrous oxalate in
acidic medium is
a) 0.6 b) 0.4 c) 0.2 d) 1.67
2] The oxidation state of the most electronegative element in the products of the reaction
between
BaO
2
 and H
2
SO
4
 are
a) 0 and -1 b) -1 and -2 c) -2 and 0 d) -2 and +1
3] HBr and HI reduce sulphuric acid. HCl can reduce KMnO4 and HF can reduce:
a) H2SO4 b) KMnO4 c) K2Cr2O7 d) none of these
4] One mole of N2H4 loses 10 moles of electrons to form a new compound Y. Assuming
that all nitrogen appear in the new compound, what  is the oxidation state of nitrogen?
(There is no change in the oxidation state of hydrogen.)
a) – 1 b) – 3 c) + 3 d) + 5
5] When KMnO4 is reduced with oxalic acid in acidic solution, the oxidation number of
Mn changes from:
a) 7 to 2 b) 7 to 4 c) 7 to 6 d) 6 to 2
6] When tin (IV) chloride is treated with excess of conc. Hydrochloric acid, the complex
ion (SnCl6)
2–
  is formed. The oxidation state of tin in this complex ion is :
a) +4 b) zero c) – 2 d) – 4
7] When SO2 is passed through an acidified solution of K2Cr2O7, then chromium sulphate
is formed. Change in oxidation state of Cr is from :
a) + 4 to + 2 b) + 6 to + 3 c) +7 to + 2 d) + 5 to + 3
8] Phosphorus has the oxidation state of + 3 in :
a) ortho phosphoric acid b) phosphorus acid
c) meta phosphoric acid d) pyrophosphoric acid
9] Which of the following halide ions is easiest to oxidize?
a) F
–
b) Cl
–
c) Br
–
d) I
 – 
10] Which one of the following statements is not correct?
a) Oxidation number of S in (NH4)2 S2O8 is + 6
b) Oxidation number of Os in OsO4 is + 8
c) Oxidation number of S in H2SO5 is + 8
d) Oxidation number of O in KO2 is 
1
2
?
LH Practice Sheet REDOX REACTION
LEARNERS HABITAT, 97/1, 3rd Floor, Near NCERT Gate No. 01, Adchini, New Delhi. +91-8510800081/82 
www.learnershabitat.ac.in Page 1
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