Question

state the type of chemical reactions with chemical equations take place in the following

1) magnesium wire is burnt in air
2) electric current passed through water
3) ammonia and hydrogen chloride gases are mixed

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Answer 1

Heya !!

Here is Your answer.

Given :
(i).
Magnesium Wire is Burnt in air.
When magnesium Wire is Burnt in air, then magnesium oxide is formed.

Equation : Mg + O2 -> MgO
Here, two reactants reacts to form a single compound. So, it is a Combination Reaction.

(ii).
Electric Current is passed through water.
When electric current is passed through water, then it decomposes to form Hydrogen and Oxygen ion.

Equation : H2O --> H2 + O2
Here, a single compound decomposes to form two compounds. So, it is a Decomposition Reaction.

(iii).
Ammonia and Hydrogen Chloride gases are mixed.
When ammonia and Hydrogen Chloride is mixed, Ammonium Chloride is formed.

Equation : NH3 + HCl --> NH4Cl.
Here, two reactants combine to form a single compound. So, it is a type of combination Reaction.


Hope You Got It

Answer 2

Answer: The chemical equations are given below.

Explanation:

• For 1:

When magnesium wire is burnt in air, it results in the formation of a white colored compound known as magnesium oxide.

The chemical equation for this reaction follows:

$2Mg(s)+O_2(g)\rightarrow 2MgO(s)$

This reaction is a type of synthesis reaction because atoms are combining in their elemental state to form a product.

• For 2:

When electric current is passed through water, it breaks down into two gases which are hydrogen and oxygen. Hydrogen gas is released at cathode and oxygen gas is released at anode.

The chemical reaction for this reaction follows:

$2H_2O(l)\rightarrow 2H_2(g)+O_2(g)$

This reaction is a type of decomposition reaction because a single compound is breaking down into two products.

• For 3:

When ammonia is mixed with hydrogen chloride, it results in the formation of a white colored compound known as ammonium chloride.

The chemical equation for the above reaction follows:

$NH_3(g)+HCl(g)\rightarrow NH_4Cl(s)$

This reaction is a type of combination reaction because 2 compounds are reacting together to form a single compound.