Which of the following is used as a source of hydrogen gas needed to manufacture fertilisers ?1 pointBiogasNatural gasCoal gasPetroleum gas

Natural gas is used as a source of hydrogen gas needed to manufacture fertilisers.

Here's a step-by-step explanation:

1. Natural gas, primarily methane (CH4), is the main source of hydrogen in the world today.

2. In a process called steam-methane reforming, high-temperature steam (700°C–1,000°C) is used to produce hydrogen from a methane source, such as natural gas.

3. In steam-methane reforming, methane reacts with steam under 3–25 bar pressure (1 bar = 14.5 psi) in the presence of a catalyst to produce hydrogen, carbon monoxide, and a relatively small amount of carbon dioxide.

4. The produced hydrogen is then used in the Haber process to produce ammonia, which is a key component in many fertilisers.