Question

choose the correct one answer​

Answer 1

Answer:

both process is chemical change

Answer 2

complete question:

Anaerobic bacteria digest animal waste and produce biogas changeA . The biogas is then burnt as fuel changeB. The following statement pertains to these changes . choose the correct one .

A. Process A is a chemical change

B. Process B is an chemical change

C. Both processes A and B are chemical change

D. None of these processes is a chemical change

Answer:

C .Both processes A and B are chemical changes

Explanation:

• Anaerobic bacteria are those that cannot survive or thrive in environments where humans are breathing oxygen.
• Chemical change is the transformation of a chemical material into one or more distinct substances, as when iron rusts or when copper displaces zinc from zinc sulphate.
• The product of a chemical reaction, or chemical change, has different properties from the reactant due of the way in which the atoms or molecules are grouped.
• Animal manure is digested by anaerobic bacteria, which results in the formation of biogas as the final product of the reaction.

animal waste (input) → biogas (output)

In the above reaction change A is the chemical change.

• Change B involves burning biogas as fuel to create energy and a new product.

fuel → energy + ash

• Because old reactants are used to create new products, change B is likewise a chemical change.

Final answer:

As a result both processes A and B are chemical changes.

#SPJ6