When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH
(Molecular mass = 40) and liberates a gas Z which easily catches fire.
Identify X, Y, Z.

Open in App

Solution

We know that metals when treated with water form metal oxide and hydrogen gas. The metal oxide further reacts with water to form metal hydroxide. However, very reactive metals like sodium and potassium directly form metal hydroxide and hydrogen gas on reaction with water. Since the molecular mass of the hydroxide is 40, therefore the hydroxide is NaOH and the metal is sodium (Na). Following is the chemical equation for the reaction
Na (s) + H₂O (l) â†’ 2NaOH (aq) + H₂ (g)
Thus
X is sodium metal (Na), Y is sodium hydroxide (NaOH) and Z is hydrogen gas (H₂).

Suggest Corrections

Similar questions

Q. When a metal

X

is treated with cold water, it gives a basic salt

Y

with molecular formula

X O H

(molecular mass

= 40

) and liberates a gas

Z

which easily catches fire. Identify

X, Y

and

Z

Q. When a metal X is treated with cold water, it gives a base Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z, which easily catches fire. Identify X, Y and Z and also write the reaction involved.

Question 42
When a metal X is treated with cold water, it gives a base Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z, which easily catches fire. Identify X, Y and Z and also write the reaction involved.

Q. When a metal X is treatwd with cold water it gives a basic salt Y with molecular formula XOH (molecular mass=40) and liberates a gas Z. Identify X, Y and Z and also write the reactions involved

A metal on reaction with an acid, liberates a gas which gives a pop sound when brought in contact with a flame. Identify the gas?

Join BYJU'S Learning Program

When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH(Molecular mass = 40) and liberates a gas Z which easily catches fire.Identify X, Y, Z.

When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH
(Molecular mass = 40) and liberates a gas Z which easily catches fire.
Identify X, Y, Z.