Question Detail

Contact lenses are made from ?

Polyvinyl chloride
Teflon
Polystyrene
Lucite

Answer: Option A

Similar Questions :

1. Due to rusting the weight of iron

Decreases
Increases
Remains the same
Uncertain

Answer: Option B

2. The isotope atoms differ in ?

number of neutrons
atomic number
number of electrons
atomic weight

Answer: Option A

Explanation:

Important to note that isotope atoms have same atomic number.

3. Which of the following gases is the most toxic?

Carbon dioxide
Sulphur dioxide
Carbon monoxide
Acetic acid

Answer: Option C

4. Natural rubber is a polymer derived from ?

ethylene
propylene
isoprene
butadiene

Answer: Option C

5. pH of water is

5
6
7
8

Answer: Option C

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