Question

Which of the following is correctly matched?

• A. $\begin{array}{cc}\text{Element}& \text{Uses}\\ \text{Hydrogen}& \text{Fuel}\\ \text{Chlorine}& \text{Combustion}\\ \text{Nitrogen}& \text{Preserving food}\\ \text{Oxygen}& \text{Disinfectant}\end{array}$
• B. $\begin{array}{cc}\text{Element}& \text{Uses}\\ \text{Hydrogen}& \text{Fuel}\\ \text{Chlorine}& \text{Disinfectant}\\ \text{Nitrogen}& \text{Preserving food}\\ \text{Oxygen}& \text{Combustion}\end{array}$
• C. $\begin{array}{cc}\text{Element}& \text{Uses}\\ \text{Hydrogen}& \text{Fuel}\\ \text{Chlorine}& \text{Bleaching}\\ \text{Nitrogen}& \text{Fertilizer}\\ \text{Oxygen}& \text{Decomposition}\end{array}$
• D. $\begin{array}{cc}\text{Element}& \text{Uses}\\ \text{Hydrogen}& \text{Disinfectant}\\ \text{Chlorine}& \text{Fuel}\\ \text{Nitrogen}& \text{Decomposition}\\ \text{Oxygen}& \text{Preserving food}\end{array}$

Answer 1

Answer: (B), (C)

The correct options are
B

$\begin{array}{cc}\text{Element}& \text{Uses}\\ \text{Hydrogen}& \text{Fuel}\\ \text{Chlorine}& \text{Disinfectant}\\ \text{Nitrogen}& \text{Preserving food}\\ \text{Oxygen}& \text{Combustion}\end{array}$

C

$\begin{array}{cc}\text{Element}& \text{Uses}\\ \text{Hydrogen}& \text{Fuel}\\ \text{Chlorine}& \text{Bleaching}\\ \text{Nitrogen}& \text{Fertilizer}\\ \text{Oxygen}& \text{Decomposition}\end{array}$

Hydrogen is used in the hydrogen-powered fuel cell.

Chlorine is a good disinfectant and bleaching agent.

Nitrogen is used to preserve food items and is added in fertilizers.

Oxygen aids combustion and is also involved in the decomposition process.