Question

(a) Support your answer with chemical equations in each case. What happens
magnesium ribbon is burnt in air ? What is the state of the metal in the product formed ?
(b) An element A forms two oxides AO and AO2

. The oxide AO is neutral whereas the

oxide AO2

is acidic in nature. Would you call element A a metal or a non metal ?

Answer 1

a) when magnesium ribbon is heated in air it strongly oxidized to form magnesium oxide with emission of heat and light .

Mg + O2 ---> MgO + heat + light

b) we would recognize the metal A as non metal because nonmetal only forms acidic oxides

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Answer 2

(a)Mg + O2 ---> MgO

The product is solid.

(b)Element A is Carbon. It is a Non - metal.