Question

Which of the following is thermally stable?
A.silicone polymers
B.rayon
C.bakelite
D.perlon-L

Answer 1

Thermodynamic stability of a compound is the point at which a change to its components (or more modest mixes) includes a decline in entropy. Entropy is a proportion of the potential ways the energy that particles have can be scattered (essentially heat lost or picked up and arrangements of particles).

Complete step by step answer:
(1)Silicones are polymers that incorporate silicon along with carbon, hydrogen and oxygen. They have a substituting $- Si - O - Si -$ type structure. Silicones are water repellent, impervious to compound assault and are thermally steady since they don't break down at high temperature. We can call it thermodynamically stable or thermodynamic stability.
Hence, option A is the correct answer..

Additional information
According to a textbook, The expressions "stable" and "precarious" allude to the thermodynamic inclination of a substance to break down into its components. Moreover, a thermodynamically steady compound just methods an intensifier that has a negative standard Gibbs free energy of development. So indeed, if a compound is thermodynamically steady, it tends to unexpectedly disintegrate into its components. Nonetheless, by and by, this may not generally be acknowledged in light of the fact that the deterioration cycle can be moderate.

Note:
"Un-reactive" compound species act thusly. Their (peripheral) electrons are well past the impact of their cores and even with a little trigger (energy), they will reallocate fiercely, till a harmony is reached. Reactivity relies upon Unequal Distribution of Electrons (UDED) in a chemical species.