Question

Which of the following are the advantages of plastic over metals?
1.Plastic are lighter
2.Plastics are usually cheaper
3.Plastics are inert to both acids and alkalis.
A.(1) and (2) only
B.(1) and (3) only
C.(2) and (3) only
D.(1),(2) and (3)

Answer 1

Hint:For modern purposes, plastic gives taking care of and versatility benefits when contrasted with metals. They offer a similar quality and unbending nature alongside very lower weight.

Complete step by step answer:
Plastics are produced using characteristic and natural materials by the cycle of polymerisation or poly-condensation. This makes them adaptable and simple to form in any shape. Thus, this affirms that plastic is lighter than metals permitting it to be prepared into complex structures.
When all is said in done, hefty materials have greater expense however plastics are typically less expensive in light of the fact that the crude materials from which it is made like polythene are by products gotten from the oil business Metals will in general respond promptly with corrosive and salt. While plastic will in general oppose the impact of corrosive base because of nonattendance of electronic trade.
And hence option D is the correct answer.

Additional information
Even though plastic is cheap and widely used, what are the disadvantages of it?
 Plastics can:
1) Sacks tossed indiscreetly on streets get into channels and the sewer framework and gag them.
2) Give out destructive gases after warming or consuming which causes air contamination and numerous medical conditions.
3) Sacks loaded up with trash are discarded in the open.

Note:
One of the most significant favourable circumstances of plastic over metal is they have higher rigidity. Be that as it may, metal is likewise worthwhile as it can oppose hot and cold temperatures.