Principles Related To Practical & Everyday Life Chemistry

Question 1

Define: Nanotechnology

Answer 1

Nanotechnology is the design, characterization, production and application of structures, devices and systems by controlling shape and size at nanometer scale.

Question 2

Define: atom economy

Answer 2

Atom economy is a measure of the amount of atoms from the starting materials that are present in the useful products at the end of the chemical process.

%atok economy = formula weight of the desired product/sum of formula weight of all reactant used in the reaction × 100

Question 3

Define: Nanochemistry

Answer 3

Nanochemistry is the combination of chemistry and nanoscience which deals with designing and synthesis of materials of nanoscale with different size and shape, structure and composition and their organization into functional architecture

Question 4

Define: Green Chemistry

Answer 4

Green chemistry is the use of chemistry for pollution prevention by environmentally conscious design of chemical products and processes that reduce or eliminate the use Or generation of hazardous substance

Question 5

What do you mean by sol and gel?

Answer 5

Sol : sol are dispersion of colloidal particles in liquid.
Gel : a gel is interconnected rigid network with pores of sub micrometer dimension and polymeric chains whose average length is greater than a micrometer