List of top Chemistry Questions on Redox reactions asked in KCET

In the following pairs, the one in which both transition metal ions are colourless is

In the reaction between hydrogen sulphide and acidified permanganate solution,

A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 sec. The mass of calcium deposited is:

In the reaction between moist SO₂ and acidified permanganate solution:

Which one of the following oxoacids of phosphorus can reduce AgNO₃ to metallic silver ?

\(aMnO^{-}_4+bS_2O_{3}^-+H_2O\rightarrow xMnO_2+ySO_{4}^-+zOH^-\)
a and y respectively are

The reducing agent in the given equations :
\(4\ Ag_{(s)}+8\ CN_{(aq)}^-+2H_2O_{(aq)}+O_{2_{(g)}}\rightarrow4[Ag(CN)_2]_{(aq)}^-+4\ OH_{(aq)}^-\)
\(2[Ag(CN)_2]_{(aq)}^-+Zn_{(s)}\rightarrow[Zn(CN)_4]_{(aq)}^{2-}+2Ag_{(s)}\)

\((NH_4)_2Cr_2O_7\) on heating liberates a gas. The same gas will be obtained by

The strong reducing property of hypophosphorous acid due to

In which of the following compounds, an element exhibits two different oxidation States ?

Which of the following is not true for oxidation?

Which of the following is not true for oxidation?

$3ClO^{-}(aq) -> ClO^- + 2Cl^-$ is an example of

Alkali metals have negative reduction potential and hence they behave as

The standard emf of a galvanic cell involving $3$ moles of electrons in its redox reaction is $0.59 \,V$. The equilibrium constant for the reaction of the cell is

In the ionic equation : $BiO _{3}^{-}+6 H ^{+}+ Xe ^{-} \longrightarrow Bi ^{3+}+3 H _{2} O$ the value of $X$ is -

In the conversion of $Br_2$ to $BrO^-_3 $, the oxidation number of $Br$ changes from

The formula mass of Mohr's salt is $392$. The iron present in it is oxidised by $KMnO_4$ in acid medium. The equivalent mass of Mohr's salt is

How many Coulombs are required to oxidise 0.1 mole of H₂O to oxygen?

In the reaction between moist SO₂ and acidified permanganate solution :