IIT-JEE 2009 · Paper 2 · Chemistry Q10 · Dronacharya Exams

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ChemistryMatrix match+8Question 10 of 57

Match each of the reactions given in Column I with the corresponding product(s) given in Column II.

Column I

A
Cu + dil $\ce{HNO3}$
B
Cu + conc $\ce{HNO3}$
C
Zn + dil $\ce{HNO3}$
D
Zn + conc $\ce{HNO3}$

Column II

P
NO
Q
$\ce{NO2}$
R
$\ce{N2O}$
S
$\ce{Cu(NO3)2}$
T
$\ce{Zn(NO3)2}$

Answer and worked solution

Official answer: A → P, S; B → Q, S; C → R, T; D → Q, T

A: $\ce{3Cu + 8HNO3(dil) -> 3Cu(NO3)2 + 2NO + 4H2O}$ . → P, S.
B: $\ce{Cu + 4HNO3(conc) -> Cu(NO3)2 + 2NO2 + 2H2O}$ . → Q, S.
C: $\ce{4Zn + 10HNO3(dil) -> 4Zn(NO3)2 + N2O + 5H2O}$ . → R, T.
D: $\ce{Zn + 4HNO3(conc) -> Zn(NO3)2 + 2NO2 + 2H2O}$ . → Q, T.

Answer: A → P, S; B → Q, S; C → R, T; D → Q, T

Topics:Oxoacids Balancing redox reactions

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