IIT JEE , AIEEE Forum - Chemistry , Physical Chemistry - Difficulties from IIT Chemistry -O.P. Agarwal

Akshay

Chapter: Concept of acid base and oxidation Reduction
Pg No. : 243 -247
Objective Questions

Q. No. 13 The compound which could act both as an oxidising agent as well as a reducing agent is
A) SO₂B)MnO₂C)Al₂O₃       D)CrO₃
The answer is given to be Al₂O₃ but SO₂can also act as the same.

Q NO.27 One mole of N₂H₄loses 10 mol of electrons to form anew compound Y.
Assuming that all nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y?(There is no change in the oxidation state of nitogen)
A)+3    B)-3       C)-1   D)+5
How to solve this?

Q No. 49 The oxidation number of Ni in Ni(CO)₄A)-4      B)4      C)0   D)+2
Please provide detailed solution

Q no. 58   The oxidation number of phoisphorous in Ba(H₂PO₂) is
A)+3   B)+2   C)+1   D)-1
Pls. provide detailed solution

Q no.64    Oxidation number of iron in Fe_0.94O is
A)+2      B)+3      C)200/94   D)8/3
What does that 0.94 mean and what effect does it have on the oxidation number of Fe?

anushadiamond

last question answer is c 200/94

Akshay

PLease explain what does that 0.94 mean?

jatinpreet

answer to last question-

=> 0.94x-2=0
=>0.94x=2
=>x=200/94

sirisha

for question no 58 is the answer +1.if it is correct i will send u my answer
i think it is correct

sirisha

for question no 49. the answer is zero as
ni(co)4 is a neutral complexs

uday_sravan

Answer of question no. 64 is +2&+3. Here 0.94 means it is non-stichiometric compound.

itarsiking

itarsiking

itarsiking

yaar ye sabhi problem ka answer mein baad mein tere emailid par dunga tu apna id de

frenied

answer for Q.27
let new oxidn.state be a.
then change in oxidn no.of nitrogen-2a-(-4)
for we consider change for 2 atoms.
but change=total electorns lost by one electron by one mole
thus
2a+4=10
a=+3.

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