MolSynapse
question bank
All chapters
NEET
JEE
Practice
MolSynapse
/
Question bank
/
Redox Reactions
/
Stoichiometry of redox reactions
JEE Main level
Single correct option
Difficulty 2 of 3
rx127
Chlorine disproportionates in hot alkali:
3
Cl
X
2
+
6
OH
X
−
5
Cl
X
−
+
ClO
X
3
X
−
+
3
H
X
2
O
. Taking Cl = 35.5, the equivalent mass of
Cl
X
2
in this reaction is:
A
42.6
B
71.0
C
35.5
D
7.1
Answer: A
Per 3
Cl
X
2
, 5 electrons are lost (one Cl to
+
5
) and 5 gained (five Cl to
−
1
). So
n
-factor of
Cl
X
2
=
5/3
. Equivalent mass
=
71/
(
5/3
)
=
42.6
.
Practice Redox Reactions
More on Stoichiometry of redox reactions
Previous question
Next question
More questions on Stoichiometry of redox reactions
Molar volume at STP is 22.4 L/mol. A hydrogen peroxide solution is labelled '11.2 volume', meaning 1 L of it releases 11.2 L of O2 at STP on...
JEE Main level
Use K = 39, Cr = 52, O = 16, Fe = 56, S = 32. In acidic solution, 0.49 g of K2Cr2O7 (reduced to Cr^3+) oxidises what mass of FeSO4 (to Fe^3+...
JEE Main level
Use Cu = 63.5. A copper(II) solution is treated with excess KI (2Cu^2+ + 4I- -> 2CuI + I2) and the iodine is titrated with 0.1 M Na2S2O3 (I2...
JEE Main level
Use Na = 23, S = 32, O = 16, K = 39, Mn = 55. In acidic medium, MnO4- oxidises sulfite to sulfate. The mass of KMnO4 needed to oxidise 6.3 g...
JEE Main level
Use Cu = 63.5 and molar volume 22.4 L/mol at STP. Copper reacts with dilute nitric acid as 3Cu + 8HNO3 -> 3Cu(NO3)2 + 2NO + 4H2O. The volume...
JEE Main level
Use As = 75, O = 16. Arsenic(III) is oxidised to arsenic(V) by iodine (I2 is reduced to I-). The volume of 0.1 M I2 required for 0.495 g of ...
JEE Main level