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 and Z and also write the reaction involved

Science - Exemplar Problems

Chapter_Metals and Non Metals




This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Salt Y:  X OH - molecular mass = 40..
so  atomic mass of X is  40 - 16 - 1 = 23... So it is sodium.
so  Y =  sodium hydroxide.

Sodium + water ===  sodium hydroxide + hydrogen gas...
gas Z is hydrogen gas...

2 3 2