Question

Of the reactions below, which one is a decomposition reaction? A) NH4Cl NH3 + HCl B) 2Mg + O2 2MgO C) Cd(NO3)2 + Na2S CdS + 2NaNO3 D) 2N2 + 3H2 2NH3

Answer 1

Answer:

Answer is (A)

Hope it helps !!

Answer 2

Answer:

Of the reactions below, a decomposition reaction is $NH_{4}Cl$ →$NH_{3} + HCl$.

Explanation:

There are four type of reactions occurs they are,

Combination reaction

When two or more compounds are combined together to form one particular compound. Then this type of reactions are known as Combination type of reaction example, A+B→C

Decomposition reaction

When a complex molecule breaks down to multiple ones. Then the reaction is known as decomposition reaction. for example, AB→A+B.

Precipitation reaction

When two solutions of soluble salts are mixed together and results a precipitate of insoluble solid. Then it is known as precipitation reaction.

for example, A + B(Soluble salt)  → Precipitate +  C(Soluble salt)

Neutralization reaction

When acid and base react with each other to form salt and water then this reaction is known as neutralization reaction.

For example, Acid + Base → Salt + Water

Combustion reaction

Carbon dioxide and water are produced when oxygen reacts with a substance. These processes are exothermic, which means that heat is produced. For example, $A + O_{2}$→$H_{2}O + CO_{2}$

Displacement reaction

In the displacement reaction, one element interacts with another.

For  example, A + BC → AC + B.

Hence, from the above type of examples the decomposition type of reaction is, option (A) $NH_{4}Cl$ →$NH_{3} + HCl$.

To know more about decomposition reaction, follow the link given below,

https://brainly.in/question/2379104

https://brainly.in/question/6121309

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