Which of the following is not a redox reaction ?
KCN + Fe(CN)2 K4[Fe(CN)6]
Rb + H2O RbOH + H2
H2O2 H2O + O
CuI2 CuI + I2
Consider the reaction ,
Fe2+ Fe3+ + e-
the reaction towards the left is a reduction
the reduction towards the right is a reduction
the reaction towards the right is an oxidation
the reaction towards the right is an oxidation and the reaction towards the left is an reduction
Which of the following statement is not true for hydrolysis of XeF6?
XeOF4 is formed.
XeO2F2 is formed.
It is a redox reaction.
XeO3 is formed
C.
It is a redox reaction.
Hydrolysis of XeF6 is not a redox reaction. XeF6 reacts violently with water, but slow hydrolysis by atmospheric moisture gives highly explosive solid, XeO3.
XeF6 (s) + 3H2O (l) XeO3 (s) + 6HF (aq)
Partial hydrolysis of XeF6 yields XeOF4 and XeO2F2.
XeF6 + H2O XeOF4 + 2HF
XeF6 +2H2O XeO2F2 + 4HF
When SO2 gas is passed through an acidified K2Cr2O7 solution :
the solution becomes blue
SO2 gets reduced
Cr(SO4)3 is formed
the solution becomes colourless
In the following reaction ,
P4 + 3NaOH + 3H2O PH3 + 3NaH2PO2
phosphorus is oxidised
phosphorus is oxidised and reduced
phosphorus is reduced
sodium is oxidised
Assertion : Cu is stronger reducing agent than H2.
Reason : E° of Cu2+/Cu is negative.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
When KMnO4 reacts with KBr in alkaline medium gives bromate ion. Then oxidation state of Mn changes from +7 to
+6
+4
+3
+2