Hair contains keratin proteins which are also present in nails and wool is an example of….
a) Biochemistry
b) Inorganic chemistry
c) Physical chemistry
d) organic chemistry
Branch of chemistry dealing with the plantation and overcoming greenhouse effect is………
a) Biochemistry
b) Organic chemistry
c) Environmental chemistry
d) Inorganic chemistry
Basic
Definitions(Element, Compound, Mixtures)
Anything that has mass and occupies space is called……….
a) substance
b) Matter
c) element
d) atomic mass
Explanation:"Matter" generally includes atoms and anything made up of them, and any particles (or combination of particles) that act as if they have both rest mass and volume. However it does not include massless particles such as photons, or other energy phenomena or waves such as light.
Pure substance is classified into………
a) element
b) compound
c) mixture
d) Both a and b
A piece of matter in pure form is called……..
a) element
b) matter
c) substance
d) compound
