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Anaesthetics

Which of the ...

Question

Which of the following statements are true regarding characteristics of Teflon?
P: It is non-sticky in nature.
Q: It is heat resistant.
R: It is a good conductor of electricity.

A

Only P

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B

P, Q and R

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C

P and Q

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D

Only R

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Solution

The correct option is C P and Q

Teflon is a polymer of tetrafluoroethylene. Its chemical name is poly-tetrafluoroethylene ${(C}_{2} F_{4})_{n}$ . It is used for coating cooking utensils and industrial equipment to avoid sticking. So, teflon is non-sticky.

Its melting point is 327 $^{o}$ C. Hence it is heat resistant.

It does not conduct electricity, so it is a poor conductor of electricity.

Only P and Q are true.

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P. Plastics are generally good conductors of electricity.
Q. Ropes made of bakelite are used in cranes and elevators.
R. Teflon is a special plastic on which oil and water do not stick.
S. Plastic is non-biodegradable, hence it is not environment friendly.

Q. Mark the given statements as true or false.
1. Teflon is a plastic on which oil and water do not stick.
2. Plastics are generally good conductors of electricity.
3. Plastic is non-biodegradable, hence non environment friendly.
4. Polythene can be reshaped on heating.

Q. Which of the following statement is true for graphite?

(a) In graphite, each carbon atom is bonded to four other carbon atoms.
(b) Graphite is very hard.
(c) It is a good conductor of electricity.
(d) It is a bad conductor of electricity.

Q. Teflon is a good conductor of electricity.

Explain the following:

(c) Copper is a good conductor of electricity but it is non-electrolyte.

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