Question

State the type of chemical reactions and chemical equation that place in the following magnesium wire is burnt in air (2) electric current is passed through water (3)ammonia and hydrogen chloride gases are mixed ​

Answer 1

Answer:

1) Reaction between magnesium and air:

Mg(s) + O2(g)=====>MgO(s)

Combination reaction

A reaction in which two(or more) substances(elements or compounds) combine to form a single substance

2)Current through water:

H2O(l)=======>H2(g) + O2(g)

Electrolytic decomposition/Electrolysis

Electrolysis

Decomposition which occurs on passing electricity through the compound.

3)Ammonia and Hydrochloric acid:

NH3(g) + HCl(g)=======>NH4Cl

Combination Reaction

Additional Information:

There are three types of combination reactions:

1)Reaction between a compound and an element

2)Reaction between an element and an element

3)Reaction between a compound and a compound

Likewise,there are three types of Decomposition reaction:

1)Thermal Decomposition: Decomposition on heat

2)Electrolysis: Decomposition on electricity

3)Photolysis: Decomposition on Light

Answer 2

Answer:

1. Combination reaction

2Mg(magnesium)+O2(oxygen)=2MgO(magnesium oxide)

2. decomposition reaction

2H2O (water)=(when electricity passed) H2+O2

3. Combination reaction

NH3 (ammonia)+HCl(hydrogen chloride)=NH4Cl (ammonium chloride) +H2 (hydrogen)