F4 chemistry acids and alkalis

Please help me to answer the following questions in English.
The best answer is going to obtain 10 points.

1. Baking powder for making bread is usually a mixture of a solid acid,
HX, and sodium hydrogencarbonate. In making bread, water and a
little baking powder are added to flour. The flour paste is then heated
in an oven. A gas Y is formed in the baking process which escapes
fron the dough and eventually a 'spongy' bread is formed.
( a ) Name the gas Y.
( b ) Suggest a chemical test to identity gas Y. Explain the
observation of teh test and write an equation ( with state symbols)
for the reaction involved in the test.
( c ) Explain the role of water added to the flour for the production
of gas Y.
( d ) Write an ionic equation for the reaction of the acid, HX,
and sodium hydrogencarbonate in teh flour paste.
( e ) Heating solid sodium hydrogencarbonate can also help to
generate gas Y in the bread-making process. Write an
equation ( no state symbols are needed ) for this process.

2. For each of the following reactions, write ( if any )
( i ) a full equation ( with state symbols ) for the reaction
( ii ) an ionic equation ( with state symbols ) for the reaction
( a ) iron + dilute sulphuric acid
( b ) copper + dilute sulphuric acid
( c ) zinc oxide + dilute hydrochloric acid
( d ) calcium carbonate + dilute hydrochloric acid
( e ) potassium hydrogencarbonate + dilute nitric acid
( Hint : Zinc oxide and calcium carbonate are insoluble in water.
Potassium hydrogencarbonate is soluble in water.)