Question

Which is absent in plant ash?

• A. Mineral elements
• B. Nitrogen
• C. Essential elements
• D. Trace elements

Answer 1

The correct option is B Nitrogen

Plant ash is the burnt part of the plant which usually contain the inorganic plant material. There will be no organic material as they get destroyed when burnt. The plant ash mainly contains the inorganic elements like the potassium, phosphorus and magnesium. The inorganic material can be essential elements or the trace elements and more. Even though nitrogen is inorganic element, it is not present in the plant ash as it readily oxidises and converts into the nitrogen gas. So, nitrogen is absent in plant ash.

So, the correct option is B. Nitrogen.