Question

Q2. Fill in the blanks:

a)Biogas is released during the treatment of _______.

b)The magnetic effect of current was first observed by _______.
c)Distance travelled in _______ is defined as speed.

d)Removal of topsoil is called _______​

Answer 1

Answer:

1. Biogas is produced by anaerobic digestion of organic substrates. It is one of the oldest processes used for the treatment of industrial wastes and stabilization of sludge
2. Hans Christian Oersted
3. a particular time
4. erosion

Explanation: