Question

A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M and black coloured product and also explain the reaction of M with oxygen.

NCERT Class X
Science - Exemplar Problems

Chapter_Metals and Non Metals

Answer 1

M is  copper  and black color substance is copper oxide 
             Cu + O2= CuO

Answer 2

Answer:

metal M is copper

Explanation:

because when copper burn in air its coloured change into black

2Cu + O2 ---》 2CuO