Which of the following element starts to float when immersed in cold water?

Sodium

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

Calcium

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

Platinum

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

Potassium

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

Open in App

Solution

The correct option is B Calcium
Certain metals react with water to give metal hydroxide and hydrogen gas. In this case, calcium reacts less vigorously with water to form hydrogen gas. The metal starts floating because the bubbles of hydrogen gas formed and stick to the surface of the metal.

$C a + 2 H_{2} O \to C a (O H)_{2} + H_{2}$

Sodium and potassium react vigorously with water and liberate hydrogen gas.

Noble metals like gold and platinum react neither with water nor with strong acids.

Suggest Corrections

Similar questions

Which of the following metals float in water when it is reacted with cold water?

All objects float when immersed in liquids.

Join BYJU'S Learning Program