Which of the following metals float in their reactions with cold water?

Gold (Au)

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

Zinc (Zn)

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

Iron (Fe)

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

Calcium (Ca)

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

Open in App

Solution

The correct option is D
Calcium (Ca)

Calcium reacts slowly with water and forms calcium hydroxide, Ca(OH)₂ and hydrogen gas (H₂).

Calcium starts floating because the bubbles of hydrogen gas which are formed during the reaction stick to the surface of the metal and hence calcium float on water.

$C a (s) + 2 H_{2} O (l) \to C a_{(} O H)_{2} (a q) + H_{2} (g)$

Suggest Corrections

Similar questions

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

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

P b, A u, M g, S n, F e, A l, A g, H g, N a, Z n, C u, C a

Join BYJU'S Learning Program