M.Sc. (Semester (CBCS) Examination Nov/Dec-2018
Nano-Technology
FUNDAMENTALS OF NAOTECHNOLOGY IN CHEMISTRY
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Draw neat labeled diagrams wherever necessary.
Write balanced chemical equations wherever necessary.
Q.1 Rewrite the sentences by choosing correct answer from given alternatives: 14
The atomic theory was proposed by
Rutherford Neil Bohr
Dalton None of these
An atom does not contain
Electron Deuteron
Proton Neutron
Elements at top right of periodic table are
metals non-metals
metalloids nobel gases
Sum of atomic mass of all atoms present in one molecule is
Ionic Mass Molecular Mass
Formula unit Atomic number
Ability of an element to lose electrons and form positive ions is called
Electronegative character Electropositive character
Rate of reaction Chemical reactivity
Only metal which exists in liquid state is at room temperature
Gold Silver
Mercury Copper
Ionization energy depends upon
Magnitude of nuclear charge Atomic size
Shielding effect Atomic mass
Oxidation state of noble gases is
one two
three zero
Quantum number values for 3s are
l=0 l=1
l=0 l=2
10) Complete transfer of one or more electrons between atoms constitutes
formation of
Ionic bond Covalent bond
Co-ordinate covalent bond Dative bond
11) As we more down group, affinity of halogens for hydrogen
Increases Decreases
Remain constant Never change
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12) Metals lose electrons from their lattice to become
Positive ions Negative ions
Alkalis Non-metals
13) Bonds formed by sharing four electrons are
Covalent bonds Electrovalent bonds
Dative covalent bond Double covalent bonds,
14) Only non-metal in liquid state at room temperature is
CI Br
I Si
Q.2 Answer the following. (Any four)
What are metals and non metals?
What is an isotope and give one example?
What are compounds give examples?
Define Ionic bonding, give one example?
What is atomic number and atomic mass?
08
Write notes on. (Any Two)
Write note on structure of atom.
Write a note Nano-science and Nano-technology.
Write a note on Lattice Parameter.
06
Q.3 Answer the following. (Any Two)
Write the merits and demerits of atomic theory.
Explain the various types of nano-structures and nano-crystals.
What are the limitations of Bohr's model of an atom?
14
Answer the following. (Any one)
Explain Dalton's atomic theory with its postulates.
Explain the ionization energy and electron affinity trends in periodic table.
Q.4 Answer the following. (Any Two)
Explain Bohr atomic theory of hydrogen atom.
Explain atomic radius and ionic radius trends in periodic table.
Explain molecular orbital's with its types.
10
Answer the following. (Any one)
What are the pure substances? Explain their characteristic.
Explain the difference between compound and molecule with suitable
example.
04
Q.5 Answer the following. (Any two) 14
Briefly explain the classification of bulk Nano-structured materials, 0D, 1D, 2D
structures.
What is periodic table? Explain all groups present in periodic table with
example.
Explain homonuclear and heteronuclear diatomic molecules with suitable
example, comment on their structure.