Question Detail

Contact lenses are made from ?

Polyvinyl chloride
Teflon
Polystyrene
Lucite

Answer: Option A

Similar Questions :

1. pH of blood is ?

10.4
9
7.4
4

Answer: Option C

2. Which one of the following metals does not react with water to produce Hydrogen?

Cadmium
Lithium
Potassium
Sodium

Answer: Option A

3. The metallurgical process in which a metal is obtained in a fused state is called ?

roasting
calcinations
smelting
froth floatation

Answer: Option C

4. Oil of vitriol is

nitric acid
sulphuric acid
hydrochloric acid
phosphoric acid

Answer: Option B

5. The main chemical constituent of clay is ?

aluminium silicate
zeolites
aluminium borosilicate
silicon oxide

Answer: Option A

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