Question

Long Answer Questions
Q11. Even though plastics are useful, they are not environment friendly. Justify
the statement.
Q12. Show with the help of an activity that thermoplastics are bad conductors
of electricity
Q13. Draw diagrams only -
a) Rhizopus/Spirogyra and virus.
b) Nitrogen cycle
c) Sprinkler method
d) Any two agricultural implements
e) A simple circuit
014. Give 2 differences between -
a) Manure and fertilizers
b) Thermoplastic and thermosetting plastic,​

Answer 1

Answer:

QUE.14 (a)FERTILISER:-

●Fertiliser is a man made unorganic salt.

●Fertiliser prepared in factories.

MANURE:-

●Manure is a natural substance obtained by the decomposition of cattle dung and plant residues.

●Manure can be prepared in the field.

(b)THERMOPLASTIC:-

◆Thermoplastic can be synthesized by the process called addition polymerization

◆Thermoplastic is processed by injection moulding,thermoforming process and rotational moulding.

THERMOSETTING:-

◆Thermosetting plastics are synthesized by condensation polymerization.

◆Thermosetting plastic is processed by compression moulding, reaction, injection moulding.