Question

ribbon of megnesium burns and give ashes

Answer 1

yes Mg +0 =Mgo Mgo is ash

Answer 2

$\bf\large\color{Blue}{HEY \: FRIEND}$

Yes it is true that Ribbon of Magnesium burns in with a very sharp, white, dazzling flame.

It burns in air to produce a whitish powdery substance called Magnesium Oxide.

Hope it helps☺