You visited us 4 times! Enjoying our articles? Unlock Full Access!

Oxides and Oxoanions

Which of the ...

Question

Which of the following is the correct order of chemical reactivity with water according to electrochemical series ?

K > M g > Z n > C u

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

K > M g > C u > Z n

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C u > Z n > K > M g

No worries! We‘ve got your back. Try BYJU‘S free classes today!

M g > K > C u > Z n

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $K > M g > Z n > C u$
The correct order for the chemical reactivity with water is $K > M g > Z n > C u$ . This is because, among the given metals, potassium has the most negative standard reduction potential and copper has the highest standard reduction potential.

Metal
$K$ $M g$

$Z n$ $C u$

Standard reduction
potential (V)
$- 2.95$ $- 2.363$
$- 1.662$ $+ 0.340$

Option A is correct.

Suggest Corrections

Similar questions

Z n + C u^{2 +} \to Z n^{2 +} + C u

M g + Z n^{2 +} \to M g^{2 +} + Z n

C u + 2 A g^{+} \to C u^{2 +} + 2 A g

C a, N a, M g, Z n, F e, H, C u, H g, A g, A u

C a, N a, M g, Z n, F e, H, C u, H g, A g, A u

L i

K

C a

N a

M g

A l

Z n

F e

P b

C u

H g

A g

I

Z n (s) + C u {({N O}_{3})}_{2} (a q) \to C u (s) + Z n {({N O}_{3})}_{2} (a q)

I I

Join BYJU'S Learning Program

Metal	$K$ $M g$		$Z n$ $C u$
Standard reduction potential (V)	$- 2.95$ $- 2.363$		$- 1.662$ $+ 0.340$