Question

3. BaSO, +40
BaS + 4CO
In above reaction, write for each reactant that undergoes oxidation or reduction and identify
the type of reaction.
4. Give one example each of displacement, decompostion and combination reaction with
explanation.​

Answer 1

Explanation

3)In above reaction, both oxidation and reduction is occurring simultaneously. Hence above reactin is redox reaction.

4)Displacement reaction :

A single-displacement reaction, also known as a single-replacement reaction, is a reaction by which one (or more) element(s) replaces an/other element(s) in a compound. It can be represented generally as:

A+B−C→A−C+B

All simple metal with acid reactions are single displacement reactions. For example, the reaction between magnesium, Mg, and hydrochloric acid, HCl, forms magnesium chloride, MgCl2, and hydrogen,H2

Mg(s)+2HCl(aq)→MgCl2 (aq)+H2

Decomposition reaction :

A decomposition reaction is a type of chemical reaction where one reactant yields two or more

products.

The general form for a decomposition reaction is

AB→A+B

Water can be separated by electrolysis into hydrogen gas and oxygen gas through the decomposition

reaction: 2H2O→2H2 +O2

Another example is the spontaneous decomposition of hydrogen peroxide into water and oxygen: 2H2 O2→2H2 O+O2

The decomposition of potassium chlorate into potassium chloride and oxygen is yet another example:2KClO3 →2KCl+3O2

Combination reaction :

A combination reaction (also known as a synthesis reaction) is a reaction where two or more elements or compounds (reactants) combine to form a single compound (product). Such reactions may be represented by equations of the following form : X+Y→XY.

Formation of calcium oxide by the combination elements calcium and oxygen.

2Ca+O2→2CaO

Formation of ammonia by the combination of elements nitrogen and hydrogen.

N2+3H2→2NH3