Question

Draw the graph of the pair of linear equation x-y+2=0 and 4x-y-4=0 . Find the vertices of triangle formed by these lines and xaxis​

Answer 1

Answer:

When magnesium ribbon is exposed to air, it forms a layer of magnesium oxide on its surface. This layer of magnesium oxide, being a stable compound, prevents further reaction of magnesium with oxygen. Hence, it should be cleaned before burning in air to remove this layer so that the metal can be exposed to air properly.