Download Basics of Material Sciences - E

BASICS OF MATERIAL SCIENCE
II B.SC. MICROBIOLOGY WITH NANOTECHNOLOGY
UNIT I
1 Mark
1
Atom consists of smaller particles called ______
(1) Proton (2) Neutron (3) Electron (4) All
2
Nucleus of an atom consists of _______
(1) proton & Neutron (2) proton & electron (3)electron & neutron (4) All
3
The rays of light that travel in straight line from the cathode surface are called _____
(1) Cathode rays (2) Anode rays (3) gamma rays (4)X-rays
4
Electrons carry ________ charge
(1) Positive (2) Negative (3) neutral (4) No charge
5
Properties of cathode rays were explained by ________
(1) Bohr (2) Faraday (3) JJ Thomson (4) W Crookes
6
The specific charge (e/m) of an electron is ________ x10 11 coulombs per kilogram.
(1) 1.76 x 10 11 (2) 1.86 x 1011 (3) 1.96 x 1011 (4)1.66 x1011
7
Rutherford used ________ particles emitted by radioactive source to explore atom structure.
(1) Alpha (2) Beta (3) Gamma (4) X-ray
8
The diameter of atom is measured in _________ units.
(1) Micron (2) Nano (3) Angstrom (4) Centimeter
9
Mass of an atom is made up of ______.
(1) proton & Neutron (2) proton & electron (3)electron & neutron (4) All
10
Number of protons in the nucleus of a normal atom is known as _________
(1) Atomic number (2) Mass Number (3) Avogadro number (4) Atomic weight
The average relative weight of its atom compared to the weight of one atom of oxygen taken
11 to be 16 is known as _______
(1) Atomic number (2) Mass Number (3) Avogadro number (4) Atomic weight
12
Atoms having same number of protons and different number of neutrons are called _____
(1) Isotopes (2) Isobar (3) Radioisotopes (4)Nonradioactive Isotopes.
Atoms of different chemical element with same number of mass but different atomic number
13 is called ______
(1) Isotopes (2) Isobar (3) Radioisotopes (4)Nonradioactive Isotopes.
14
The number used to calculate the amount of pure substance is ______
(1) Atomic number (2) Mass number (3) Avogadro number (4) All
15
Avogadro number N is equal to _______
(1) 6.022 x 1023 mol-1 (2) 6.022 x 1023 mol (3)6.022 x 1024 mol-1 (4) 6.022 x 1024 mol
16
The most probable location for finding an electron is _______
(1) Orbit (2) Orbital (3) Nucleus (4) Electrode
17
The characteristics of electron and orbital are described by ________.
(1) Atomic number (2) Mass number (3) Quantum number (4) Avogadro number
18
Average distance of orbital from nucleus is determined by _______ quantum number.
(1) Principal (2) Azimuthal (3) magnetic (4) Spin
19
Shape of orbital is determined by ________ quantum number.
(1) Principal (2) Azimuthal (3) magnetic (4) Spin
20
Orientation of orbitals in space is determined by ________ quantum number.
(1) Principal (2) Azimuthal (3) magnetic (4) Spin
The direction of electrons spinning in magnetic field is determined by _______ quantum
21 number.
(1) Principal (2) Azimuthal (3) magnetic (4) Spin
22
The maximum number of electrons in shell is calculated by _______
(1) 2n2 (2) 2(2l+1) (3) n-1 (4) A-Z
23
. The maximum number of electrons in subshell is calculated by _______
(1) 2n2 (2) 2(2l+1) (3) n-1 (4) A-Z
24
Subshells have same energy but different _______
(1) Size (2) Shape (3) Orientation (4) All
25
The number of electron in each subshell is only ______
(1) 2 (2) 4 (3) 1 (4) 6
5
1. Draw atomic structure
Marks
2. Write about the isotopes
3. Write about the vector model
4. Give a short note on Pauli’s exclusion Principle
8 Marks
1. Explain the properties of cathode rays with suitable experiment
2. Explain quantum numbers
3. Explain in detail about the Atomic Models
UNIT II
1
A solid whose constituent molecules or atoms are arranged in a systematic pattern is ______
(1) Element (2) metal (3) crystal (4) salt
2
Boundary between crystallites is called as ______
(1) grain boundary (2) margin (3) lattice point (4)axis
3
An infinite array of points in three dimensions in which every point has surroundings
identical to every other point in the array is called ______
(1) unit cell (2) space lattice (3) grain boundary (4)crystal system
4
The most common types of space lattices are _________
(1) bcc (2) fcc (3) hcp (4) all
5
The smallest component of the space lattice is ______
(1) unit cell (2) atom (3) lattice point (4) electron
6
The 14 space lattices are called _______
(1) bravis lattice (2) unit cell (3) crystal system (4)symmetry
7
Which of the following is a cubic crystal?
(1) nacl (2) graphite (3) zinc (4) kmno4
8
Which of the following is a monoclinic crystal?
(1) feso4 (2) sn (3) zn (4) caco3
9
Which of the following is orthogonal crystal?
(1) baso4 (2) nacl (3) zn (4) caco3
10
Which of the following is rhombohedral crystal?
(1) zn (2) feso4 (3) graphite (4) cac03
11
Which of the following is hexagonal crystal?
(1) nacl (2) graphite (3) zn (4) feso4
12
The number of nearest atoms directly surrounding a given atom is ______
(1) atomic number (2) co-ordination number (3)mass number (4) avagadro number
13
The co-ordination number for simple cube is _____
(1) 6 (2) 8 (3) 12 (4) 14
14
The co-ordination number for BCC is ____
(1) 6 (2) 8 (3) 12 (4) 24
15
The co-ordination number for FCC is ____
(1) 6 (2) 8 (3) 12 (4) 24
16
The geometric environment of each atom is same in _____
(1) Bcc (2) fcc (3) hcp (4) all
17
The atomic packing factor of BCC is ______
(1) 0.68 (2) 0.74 (3) 0.84 (4) 0.64
18
The atomic packing factor of FCC is ______
(1) 0.68 (2) 0.74 (3) 0.84 (4) 0.64
19
The atomic packing factor is calculated by ______
(1) V/V (2) v/V (3) V/v (4) v*V
20
Total atoms in BCC unit cell is _____.
(1) 4 (2) 2 (3) 6 (4) 1
21
Total atoms in FCC unit cell is _____.
(1) 4 (2) 2 (3) 6 (4) 1
22
_________ is the imaginary line passing through the centre of a crystal.
(1) plane of symmetry (2) centre of symmetry (3)axis of symmetry (4) none
23
Atomic radius of simple cube is _____
(1) a/2 (2) ?3/4a (3) ?2 a/4 (4) ?/2
24
Atomic radius of BCC is _____
(1) a/2 (2) ?3/4a (3) ?2 a/4 (4) ?/2
25
Atomic radius of FCC is _____
(1) a/2 (2) ?3/4a (3) ?2 a/4 (4) ?/2
5 Marks
1.
2.
3.
4.
5.
Crystal Structures
Write about the Unit Cell
Write about Co-ordination Number
Write about the Atomic Packing
How will you calculate atomic Radius
8 Marks
1. Write in detail about the Crystal Symmetry
2. Calculate the Atomic Packing Factor
3. Write about various crystal Structures
UNIT III
1
Atoms and molecules are more closely packed in _____
(1) solid (2) liquid (3) gas (4) all
2
The type of bonding determines ________ property of the material.
(1) physical (2) chemical (3) electrical (4) all
3
_________ are the strongest bonds between atoms by virtue of their interatomic structure.
(1) primary (2) secondary (3) tertiary (4) all
4
Which of the following is a primary bond?
(1) ionic (2) vanderwaals (3) peptide (4) hydrogen
5
Which of the following is a secondary bond?
(1) ionic (2) covalent (3) peptide (4) hydrogen
6
Energy required for the formation of one mole of substance from its atoms is called ______
(1) potential energy (2) kinetic energy (3) bond energy (4) atomic power
7
The bond formed between electropositive and electronegative atoms is ________
(1) ionic (2) covalent (3) hydrogen (4) metallic
8
The bond formed by sharing of electrons between atoms is ______
(1) ionic (2) covalent (3) metallic (4) hydrogen
9
The principal force holding together the atoms of a metal is ______.
(1) ionic (2) covalent (3) hydrogen (4) metallic
10
Which of the following is an ionic solid?
(1) nacl (2) germanium (3) gold (4) diamond
11
Which of the following is a covalent solid?
(1) nacl (2) germanium (3) gold (4) MgO
12
Which of the following is a Metallic compound?
(1) nacl (2) germanium (3) gold (4) MgO
13
Bonds formed by dipole attractions are called ______.
(1) primary (2) secondary (3) mixed (4) metallic
14
________ of the following has mixed ionic covalent bonding in its structure.
(1) diamond (2) quartz (3) gold (4) platinum
15
The physical properties of ice and water is due to ________ bond.
(1) ionic (2) covalent (3) peptide (4) hydrogen
16
________ are called molecular bonds.
(1) primary (2) secondary (3) mixed (4) metallic
17
________ bond is important in many biological molecules.
(1) ionic (2) covalent (3) peptide (4) hydrogen
18
example of secondary bond is
(1) hydrogen (2) dipole (3) dispersion (4) all
19
Unsaturated covalent bonding refers to _________.
(1) ionic (2) covalent (3) hydrogen (4) metallic
20
______ bond is non-directional.
(1) ionic (2) covalent (3) hydrogen (4) metallic
21
_________ compounds have higher thermal and electrical conductivity.
(1) ionic (2) covalent (3) hydrogen (4) metallic
22
____________ bonds have low melting points.
(1) primary (2) secondary (3) tertiary (4) peptide
23
__________ compounds are soft rubbery elastomers that form plastics.
(1) ionic (2) covalent (3) hydrogen (4) metallic
24
The rearrangement of orbitals is called _______.
(1) bonding (2) dispersion (3) hybridization (4)polymerization
25
At the equilibrium separation the net force between atoms is _____.
(1) zero (2) one (3) equal (4) unequal
5 Marks
1.
2.
3.
4.
Give a short note on types of Bonds
Write about the Mechanism of Bond Formation
Write about Ionic Bond
Give a brief note on the Secondary bonds
8 Marks
1. Chemical Bonding and Properties of solid Bonds
2. Write a detail note on the various types of bonds
UNIT IV
1. Semiconductors are insulators at ________.
(1) 0 K (2) 10 K (3) 100 K (4) 200K
2
Which of the following is a semiconductor?
(1) carbon (2) silicon (3) selinium (4) all
3
______ is the most widely used semiconductor crystal.
(1) carbon (2) silicon (3) selinium (4) zinc sulphide
4
___________ is an intrinsic semiconductor.
(1) carbon (2) silicon (3) selinium (4) zinc sulphide
5
__________ is an extrinsic semiconductor.
(1) carbon (2) aluminium (3) selenium (4) zinc sulphide
6
__________ serves as charge carriers in semiconductor.
(1) conduction electrons (2) holes (3) a and b (4)none
7
In an intrinsic semiconductor, number of holes and number of conduction electrons are ___
(1) equal (2) same (3) constant (4) variable
8
Energy gap is represented as _______.
(1) Eg (2) EG (3) eg (4) E-G
9
In extrinsic semiconductor at absolute zero temperature valence electrons are tightly bound
by _______
(1) covaelnt bond (2) ionic bond (3) metallic bond(4) mixed bond
10
The n-type impurity of extrinsic semiconductor is called _____.
(1) acceptor (2) donor (3) receptor (4) transistor
11
The p-type impurity of extrinsic semiconductor is called ______.
(1) acceptor (2) donor (3) receptor (4) transistor
12
The n-type crystal with 5 valence electrons is ______.
(1) germanium (2) arsenic (3) silicon (4) all
13
The n-type crystal with 4 valence electrons is ______.
(1) germanium (2) silicon (3) phosphorous (4) all
14
The majority carrier in n-type semiconductor is _____.
(1) holes (2) electrons (3) protons (4) neutrons
15
The majority carrier in p-type semiconductor is _____.
(1) holes (2) electrons (3) protons (4) neutrons
16
The trivalent impurity of p-type crystal is ______.
(1) indium (2) aluminium (3) boron (4) all
The highest energy of the electron in the valence band of a crystal at 0 degree Kelvin is
17 ____
(1) potential energy (2) kinetic energy (3) fermi energy (4) bond energy
18
Fermi level energy is represented as _____.
(1) Ef (2) EF (3) ef (4) E-f
19
When all the electrons are present in valence band the P(E) =________
(1) 0 (2) 1 (3) 1/2 (4) 3/4
When Fermi level is between the conduction and valence bands in forbidden energy gap
20 P(E) is equal to _____.
(1) 0 (2) 1 (3) 1/2 (4) 3/4
21
A device that amplifies small alternating currents is called ______.
(1) resistor (2) transistor (3) amplifier (4) capacitor
The spontaneous polarization that takes place in polar crystal as a function of temperature is
22 ________
(1) ferroelectricity (2) paraelectricity (3)piezoelectricity (4) dielectricity
23
The production of electricity by pressure is _______.
(1) ferroelectricity (2) piezoelectricity (3)paraelectricity (4) dielectricity
24
Piezoelectricity occurs only in _______
(1) insulators (2) conductors (3) semiconductors (4)transistors
25
Piezoelectric materials are used in ________
(1) filters (2) air transducers (3) gramophone pickups(4) all
5 Marks
1.
2.
3.
4.
Write about the Semiconductors
Write about the Transistor
Give a short note on Piezoelectricity
Write a short note on the Ferroelectricity
8 Marks
1. Write a detail note on the types of semiconductors
2. Write a details note on Transistors and Piezoelectricity and Ferroelectricity
UNIT V
1.Organic materials are derived directly from ______.
(1) carbon (2) hydrogen (3) oxygen (4) all
2_______ is a natural organic material.
(1) wood (2) plastics (3) adhesives (4) solvent
3_______ is a synthetic organic material.
(1) wood (2) coal (3) plastic (4) petroleum
4The most common type of bond in organic materials is ________.
(1) covalent (2) ionic (3) metallic (4) mixed
5________ is a natural polymer.
(1) nylon (2) cotton (3) rayon (4) teflon
6______ is a synthetic polymer.
(1) cotton (2) wool (3) resin (4) rayon
7_______ initially breaks the covalent bond in addition polymerization.
(1) inducer (2) initiator (3) terminator (4) catalyst
8Bakelite is a polymer formed from Formaldehyde and ______.
(1) butanol (2) phenol (3) dacron (4) dettol
9_______ acts as lubricants.
(1) fillers (2) plasticizers (3) initiators (4) catalysts
10The initiator used in polymerization is _______.
(1) water (2) hcl (3) h2o2 (4) naoh
11_______ are mouldable organic resins.
(1) plastic (2) rubber (3) filament (4) fibers
12The cross-linking agent used in curing of thermosetting plastics is _______.
(1) alcohol (2) ketone (3) amine (4) carboxylic acid
13The raw material for natural rubber is ______.
(1) latex (2) gum (3) araldite (4) ebonite
14The cross-linking agent used in vulcanization of natural rubber is ______.
(1) phosphorous (2) sulphur (3) potassium (4)sodium
15___________ rubber is produced by copolymerization of butadiene and styrene.
(1) neoprene (2) butyl (3) SBR (4) silicon
16The synthetic rubber superior to natural rubber is _______.
(1) neoprene (2) butyl (3) SBR (4) silicon
17_______ rubber is used in the study of visco-elasticity.
(1) neoprene (2) butyl (3) SBR (4) silicon
18_______ rubber is valuable in surgical devices.
(1) neoprene (2) butyl (3) SBR (4) silicon
19Method used in producing synthetic fibres is _______.
(1) melt extrution (2) wet spinning (3) dry spinning(4) all
20Rayon fibres are produced by ________ method.
(1) melt extrusion (2) wet spinning (3) dry spinning(4) all
21_________ is a laminated composite material.
(1) tufnol (2) RCC (3) asphaly (4) sand
22A mechanical mixture of oil and a pigment is _______
(1) paint (2) varnish (3) lacquers (4) enamel
23________ is a mixture of a resin and a drying oil without pigments.
(1) paint (2) varnish (3) lacquers (4) enamel
24_______ is a film forming organic finish.
(1) paint (2) varnish (3) lacquers (4) enamel
25.Dispersion of pigments in varnish or resin is ________.
(1) paint (2) varnish (3) lacquers (4) enamel
5 Marks
1. Write a short note on Polymerization
2. Give a brief account on plastics
3. Write a short note on single crystals
4. Write a brief note on Agglomerated structures
5. Write about Protective coatings
8 Marks
1. Explain in detail about the polymers and mechanism of polymerization
2. Elaborate in details about the Elastomers and Rubbers
3. Write a detail note on Fibers and Filaments