The passive voice is more common in formal written English. It is often used in newspapers, academic and scientific writing and reports, which try to be less personal. Most passive sentences do not have an agent, as the focus of the sentence is not on the doer of the action but on its recipient. As a rule, the agent is only mentioned in the passive sentence if it is important new information which cannot be omitted:
Description of process:
We often use the passive voice in describing processes, when the emphasis is on the actions and not on the people who perform them. The agent is usually omitted:
Description of process for making ‘Maggi Noodles"
Firstly, 500 ml of water is boiled in a container. After that noodles and taste makers are added.
Then finely chopped vegetables are mixed after steaming them separately.The mixed stuff is cooked for only two minutes. It is then served hot.
Procedure for washing the dirty white cotton clothes.
All the dirty white cotton clothes are collected and soaked in the boilingwater and soap solution. They are taken out and beaten with fists or stick. Then they are rinsed in running water until the soap content is washed off. Then they are Squeezed and hung for drying.