Pick up the correct statement from the following:

Pick up the correct statement from the following:

a) Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite

b) Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite

c) Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic

d) All of these

Building Materials MCQs Set-7