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

Correct answer: B. Z X Y aligned & E_y^ =-1.2 ~V & E_x^ =+0.5 ~V & E_z^ =-3.0 ~V aligned Higher the reduction potential, lesser the reducing power. Order of reducing power is Z X Y

JIPMER 2014

Exam: JIPMER
Year: 2014
Subject: Chemistry
Chapter: Electrochemistry

JIPMER 2014 · Chemistry · Electrochemistry

Standard electrode potential of three metals X , Y and Z are -1.2...

Standard electrode potential of three metals

X

Y

and

Z

are

-1.2 \mathrm{~V},+0.5 \mathrm{~V}

and

-3.0 V

respectively. The reducing power of these metals will be

Options

A $Y \gt X \gt Z$
B $Z \gt X \gt Y$
C $X \gt Y \gt Z$
D $Y \gt Z \gt X$

Correct answer

B. $Z \gt X \gt Y$

Step-by-step solution

\begin{aligned} & E_y^{\circ}=-1.2 \mathrm{~V} \\ & E_x^{\circ}=+0.5 \mathrm{~V} \\ & E_z^{\circ}=-3.0 \mathrm{~V}\end{aligned}

\because

Higher the reduction potential, lesser the reducing power.

\therefore

Order of reducing power is

Z \gt X \gt Y$

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