Redox Reactions - Practice Test (1) - Class 9 MCQ

The largest oxidation number exhibited by an element depends on its outer electronic configuration. With which of the following outer electronic configurations the element will exhibit largest oxidation number?

Standard electrode potential for Sn₄⁺/Sn₂⁺ couple is +0.15V and that for the Cr³⁺/Cr couple is -0.74V. These two couples in their standard state are connected to make cell. The cell potential will be

The term reduction has one of the following options taking place.

Displacement of hydrogen from cold water is done by

In the free or the uncombined state, each atom in O₂O₃, P₄, S₈ and Mg has the oxidation number

Consider the elements: Cs, Ne, I and F. Identify the element which exhibits neither the negative nor does the positive oxidation state.

Standard electrode potential of three metals X, Y and Z are –1.2 V, +0.5 V and –3.0 V respectively. The reducing power of these metals will be

Oxidation and reduction always occur simultaneously, hence, the word “redox” was coined for this class of chemical reactions. In the following redox reaction, identify the species undergoing oxidation and reduction: 

Fractional Oxidation Number exists because

For ions composed of only one atom, the oxidation number is equal to the

Which of the following elements does not show disproportionation tendency?

The oxidation state of iron in  

The formation of sodium chloride involves two half reaction, which clearly show involvement of electrons. 2 Sum of the half reactions gives  In terms of electron-transfer change, name the oxidising agent(s) and reducing agent(s)

The strength of a reductant/oxidant in redox systems can be determined

Hydrogen is prepared from H₂O by adding

Consider the elements: Cs, Ne, I and F. Identify the element(s) that exhibits only Positive oxidation state

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 ______.

Redox reaction between copper and aqueous solution of silver nitrate happens when copper rod is dipped in silver nitrate solution. What happens in the final stage?

One of the following has application in electrode processes and cells

An oxidation number of +1 is found in all their compounds of one of the below given options

The exhibition of various oxidation states by an element is also related to the outer orbital electronic configuration of its atom. Atom(s) having which of the following outermost electronic configurations will exhibit more than one oxidation state in its compounds.

Zn²⁺/Zn represents