Question

An ordered list of chemical substances is shown:
Chemical Substances:
1. CuO
2. O2 3
3. CO2
4. NO2
5. Fe
6. H2O
Which substances in the list can be some of the reactants and products in the same combustion reaction?
A) 1, 2, and 3
B) 2, 3, and 6
C) 1, 4, and 5
D) 1, 2, and 5

Answer 1

Answer : The correct option is, (B) 2, 3 and 6.

Explanation :

Combustion reaction : It is a type of reaction where a hydrocarbon react with an oxygen molecule to give carbon dioxide, water as a product.

In general,

$Hydrocarbon+O_2\rightarrow H_2O+CO_2$

For example : Ethane react with oxygen to give carbon dioxide and water.

$C_2H_8+4O_2\rightarrow 2CO_2+4H_2O$

In the given list, $O_2$ is a reactant and $CO_2,H_2O$ are the products.

Therefore, the correct answer is, (B) 2, 3, and 6

Answer 2

Answer: The correct option is, (B) 2, 3 and 6.

Explanation: