Which of the following is a synthesis reaction?

$ \bf C_2H_4 + 3 O_2 \rightarrow 2 CO_2 + 2 H_2O\
2HCl \rightarrow H_2 + Cl_2\
2K + 2 HCl \rightarrow 2 KCl + H_2\
SO_3 + H_2O \rightarrow H_2SO_4$

Question

Which of the following is a synthesis reaction?

$ \bf C_2H_4 + 3 O_2 \rightarrow 2 CO_2 + 2 H_2O\
2HCl \rightarrow H_2 + Cl_2\
2K + 2 HCl \rightarrow 2 KCl + H_2\
SO_3 + H_2O \rightarrow H_2SO_4$

sleepyjess · Answer

@Abhisar

abhisar · Answer

Synthesis reaction is when two or more reactants react to form one product.

sleepyjess · Answer

So, the last one?

abhisar · Answer

Why not second one?

sleepyjess · Answer

Because it has 2 products

abhisar · Answer

Yes, It is decomposition reaction. Opposite of synthesis reaction.

abhisar · Answer

$\color{blue}{\text{Originally Posted by}}$ @sleepyjess
So, the last one?
$\color{blue}{\text{End of Quote}}$
$\huge \checkmark$

sleepyjess · Answer

$\color{blue}{\text{Originally Posted by}}$ @Abhisar
$\color{blue}{\text{Originally Posted by}}$ @sleepyjess
So, the last one?
$\color{blue}{\text{End of Quote}}$
$\huge \checkmark$
$\color{blue}{\text{End of Quote}}$
Yay $\large\ddot\smile$

abhisar · Answer

$\bf \bigstar \bigstar\ \huge \smile $

sleepyjess · Answer

$\bf \bigstar \hspace1.6pt\bigstar\ \huge \smile$