Question

Define the following :
[i] Combination reaction
[ii] Decomposition reaction
[iii] Displacement reaction
[iv] Neutralisation reaction​

Answer 1

Answer:

A combination reaction is a reaction where two reactants are combined into one product. A combination reaction is also known as a synthesis reaction. The reaction has the following general form: X + Y → XY

Explanation:

A decomposition reaction is a type of chemical reactionin which one reactantyields two or more products. The general form for a decomposition reaction is: AB → A + B Decomposition reactions are also known as analysis reactions or chemical breakdowns.

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Displacement reaction.A displacement reaction is a type of reaction in which part of one reactant is replaced by another reactant. A displacement reaction is also known as a replacement reaction or a metathesis reaction. There are two types of displacement reactions. Single displacement reactions are reactions where one reactant replaces part of the other:

A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products. In a neutralization reaction, there is a combination of H + ions and OH – ions which form water. A neutralisation reaction is generally an acid-base neutralization reaction.

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Answer 2

$\small \red{ \mid{ \fbox{ \tt{[i] Combination \: reaction}} \mid}}$

A chemical reaction , in which two or more substances combine to form a new substance.

$\small{ \sf \:Ex - (i)2H_2 + O_2 →2H_2O} \\ \small{ \sf \: \: \: \: \: \: \: \: \: \: \: (ii) N_2 + 3H_2 →2NH_3}$

$\small \blue{ \mid{ \fbox{ \tt{[ii] Decomposition \: reaction}} \mid}}$

A chemical reaction , in which more than one product is obtained from a single reactant.

$\small{ \sf \:Ex - (i)2H_2O →2H_2 + O_2} \\ \small{ \sf\: \: \: \: \: \: \: \: \: \: \: (ii)CaCO_3→CaO + CO_2}$

$\small \green{ \mid{ \fbox{ \tt{[iii] Displacement \: reaction}} \mid}}$

A chemical reaction , in which one element displaces other element in a compound.

$\small{ \sf \:Ex - (i)Fe + CuSO_4 →FeSO_4 + Cu} \\ \small{ \sf \: \: \: \: \: \: \: \: \: \: \: (ii)Mg + 2HCl →MgCl_2 + H_2}$

$\small \pink{ \mid{ \fbox{ \tt{[iv] Neutralisation \: reaction}} \mid}}$

A chemical reaction , between acid and base to form salt and water.

$\small{ \sf \:Ex - (i)NaOH + HCl→NaCl + H_2O} \\ \small{ \sf \: \: \: \: \: \: \: \: \: \: \: (ii)Mg +H _2SO_4 →MgSO_4 + 2H_2O}$