Write the equation for the following reaction:

Magnesium with oxygen.

Write a chemical equation for the reaction taking place in the test tube. How does the colour of the solution change? What is the change in colour of iron nails? 

Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?

 Which of the following elements would yield a basic oxide?

 $\mathrm{N}\mathrm{a},\mathrm{S},\mathrm{C},\mathrm{K},\mathrm{H}$

How do metal oxides differ from non-metal oxides?

What happens when magnesium reacts with oxygen? What is the nature of the product?

Write word equation for heated iron and steam.

Distinguish between metals and non-metals on the basis of their chemical properties.