Question

State the type of chemical reactions and chemical equations that take place in the following:
(i) Magnesium wire is burnt in air.
(ii) Electric current is passed through water.
(iii) Ammonia and hydrogen chloride gases’are mixed.
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Answer 1

Answer:

Answer

a) Combination reaction: 2Mg+O

2

→2MgO

b) Decomposition reaction: CaCO

3

→CaO+CO

2

c) Decomposition reaction: 2AgBr→2Ag+Br

2

d) Decomposition reaction: 2H

2

O→2H

2

+O

2

e) Combination reaction: NH

3

+HCl→NH

4

Cl

Explanation:

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Answer 2

Explanation:

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(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.

(ー_ー゛)

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