Question

3- A shiny brown coloured"X"element on heating
in air becomes a black coloured compound.
Name the element"X" & black coloured compound
formed. Also write the equation​

Answer 1

Answer:

"X' is Copper. When it is heated in air copper oxide (black in colour) is formed

Explanation:

2Cu + O₂ -> 2CuO

Answer 2

ⓗⓔⓨ ⓜⓐⓣⓔ❣❣

ⓨⓞⓤⓡ ⓐⓝⓢⓦⓔⓡ ⓘⓢ...

ⓒⓞⓟⓟⓔⓡ

Explanation:

ⓦⓗⓔⓝ ⓒⓞⓟⓟⓔⓡ ⓘⓢ ⓗⓔⓐⓣⓔⓓ ⓘⓣ ⓑⓔⓒⓞⓜⓔⓢ ⓐ ⓑⓛⓐⓒⓚ ⓒⓞⓛⓞⓤⓡⓔⓓ ⓒⓞⓜⓟⓞⓤⓝⓓ ⓑⓔⓒⓐⓤⓢⓔ ⓞⓕ ⓣⓗⓔ ⓓⓔⓟⓞⓢⓘⓣⓘⓞⓝ ⓞⓕ ⓒⓞⓟⓟⓔⓡ ⓞⓧⓘⓓⓔ ⓞⓝ ⓘⓣ

ⓔⓠⓤⓐⓣⓘⓞⓝ-

[Cu(H2O)6]2+ (aq) + Zn (s) --> Cu (s) + Zn2+ (aq) + 6 H2O

...

ⓟⓛⓔⓐⓢⓔ ⓜⓐⓡⓚ ⓐⓢ ⓑⓡⓐⓘⓝⓛⓘⓔⓢⓣ ⓘⓖ ⓣⓗⓔ ⓐⓝⓢⓦⓔⓡ ⓘⓢ ⓒⓞⓡⓡⓔⓒⓣ...

ⓐⓝⓓ

ⓟⓛⓔⓐⓢⓔ ⓐⓝⓓ ⓟⓛⓔⓐⓢⓔ. ⓕⓞⓛⓛⓞⓦ ⓜⓔ❣❣❣❣❣❣