Question

U
10
1 Fundamentals of Chemis
as
Self-Assessment Exercise 1.1
Identify the branch of chemistry that is related to the following information:
1. Hair contain a special class of proteins
Society, Technology and Science
called keratins, which are present in
Molecularity of the physical world
nails and wool. Biochemistry
World is composed of a few more
than a hundred elements. Elements are
2. Acetylene is the simplest hydrocarbon
building blocks of all the substances that make
that contains carbon-carbon triple bond.
up all living and non-living things. This means
Hydrocarbons are the compounds of elements are building blocks for everything in
the universe. The same elements that make
carbon and hydrogen. Organic
up earth also make up moon. A careful
3. White lead is a pigment used by artists observation of the physical world reveals that
for centuries, the metal Pb in the
matter usually occurs as mixtures. Most of the
components of these mixtures are elements
compound is extracted from its ore,
and compounds that exist as molecules. Only
galena (Pbs). Inorganic
noble gases exist as monoatomic molecules,
other substances exist polyatomic
4. Sulphuric acid (H2SO4) is extremely molecules. Air consists of many elements and
corrosive to skin. Industrial
compounds all existing in molecular form. For
5. Gases can be compressed by applying
instance O2, N2, CO2, H20 and the noble
gases. Water a molecular substance cover
.
70% of the earth's crust. It also fills the empty
6.
Some examples of complete protein
spaces under the earth. Rocks and earth are
mixtures of numerous compounds. Clay and
food are meat, milk and eggs.
sand consists of long chains of atoms called
7.
Element radium decays by emitting a-
giant molecules. Petroleum and coal that are
complex mixtures also contain hundreds of
particles and is converted into another
element radon. nuclear
8.
Calorimeter is a device that measures
the amount of heat, a substance
absorbs on heating or emits on cooling.
analyticals
Reading
thousands of molecular compounds. Living
things contain thousands of different
substances such as carbohydrates, proteins,
fats, lipids, DNA, RNA etc. All these
substances are molecular in nature.
Do you know?
The gas used in children playing balloons
Acetylene.
1.2 BASIC DEFINITIONS
Some of the important dofin​

Answer 1

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