Question

Match the correct answer

a.	Polystyrene	i.	most chemically inert
b.	Bakelite	ii.	tough and good insulator
c.	PVC	iii.	easily moulded
d.	Perspex	iv.	good electrical insulator
e.	PTFE	v.	transparent like glass

Accepted Answer

(a) Polystyrene $\to$ (iii) Easily moulded

Polystyrene is a thermoplastic. It is easily moulded because it melts when exposed to heat. It used in packaging foam, food containers, electronic devices.

(b) Bakelite $\to$ (ii) Tough and good insulator

Bakelite is thermosetting plastic and is bad conductor of heat and electricity. Hence, it is used in insulating parts in electrical fixtures like buttons, plugs, switches etc.

(c) PVC $\to$ (iv) Good electrical insulator

PVC is thermoplastic and is poor conductor of heat and electricity. Therefore, it is a good insulator. It is used in plumbing pipes and guttering, shower curtains, window frames because it is good electrical insulator.

(d) Perspex $\to$ (v) Transparent like glass

Perspex is used in making window panes of aeroplanes and cars because it is transparent like glass.

(e) PTFE $\to$ (i) Most Chemically inert

PTFE do not react with things and is used in things like non-stick frying pans, plumber’s tape and water slides.

a. Polystyrene (iii) Easily moulded

b. Bakelite (ii) Tough and good insulator

c. PVC (iv) Good electrical insulator

d. Perspex (v) Transparent like glass

e. PTFE (i) Most Chemically inert

Shobhita Johari, Pankaj Tyagi and, Parminder Chopra Solutions for Exercise 3: EXERCISES

Shobhita Johari Science Solutions for Exercise - Shobhita Johari, Pankaj Tyagi and, Parminder Chopra Solutions for Exercise 3: EXERCISES

Questions from Shobhita Johari, Pankaj Tyagi and, Parminder Chopra Solutions for Exercise 3: EXERCISES with Hints & Solutions

Learn and Prepare for any exam you want !