1 |
Conduction of electricity through gases under reduced pressure is due to the transportation of. |
positive charge
Negative charge
Both types of charges
None of these
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2 |
Quantum number values for 2p orbitals are |
n = 2, l = 1
n =1, 1 = 2
n =1, l = 0
n = 2, l = 0
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3 |
In the ground state of an atom the electron is present. |
In the nuclsus
In the second shell
Nearest to the nucleus
Farthest from the nucleus
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4 |
Splitting of spectral lines when atoms are subjected to strong electric field is called. |
Zeeman effect
Stark effect
Photoelectric effect
Compton effect
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5 |
Bohr's model of atom, is contradicted by. |
Planck quantum theory
Pauli's exclusion prinsciple
Heisenberg's uncertainty principle
All of the above
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6 |
Rutherford's model fo atom failed because |
The atom did not have a nucleus and electrons.
It did not account for the attraction between protons and neutrons.
It did not account for the stability of the atom
Their is actually no space between the nucleus and the electrons.
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7 |
The wave number of the light emitted by a certain source is 2 x 106 m-1 . The wavelength of this light will be. |
500 nm
5000 nm
200 nm
5 x10<sup>7</sup> m
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8 |
the nature of the positive rays depend on |
The nature of the electrrode
The nature of the discharge tube
The nature of the residual gas
All of the above
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9 |
The nature of copper crystals is |
Metallic
Ionic
Covalent
Molecular
|
10 |
Molecular crystals are generally |
Hard
Relatively soft
Unstable
do not exist
|
11 |
In which system all the three axes are of equal length and all angles are at right angle. |
Cubic
Tetragonal
Orthorhombic
Hexagonal
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12 |
In triclinic unit cell |
All axial lengths are equal
All internals lengths and angles are equal
Both axial lengths and angles are equal
Both axial lengths and angles are unequal
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13 |
The shape of diamond crystal is. |
cubic
Hexagonal
Tetragonal
Orthorhombic
|
14 |
Existence of an element in more than one crystalline form is known as. |
Anisotropy
Allotropy
Isomorphism
Unit cell
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15 |
Which substances has diffused melting point. |
Crystalline solids
Amorphous solids
Metallic solids
Covalent solids
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16 |
Polymorphic substances have |
Same physical and chemical properties
Different physical and chemical properties.
Same physical but different chemical properties
Different physical and same chemical properties.
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17 |
Which pair of compound are isomorphic in nature. |
NaCl and KNO3
KNO3 and MgO
MgO and NaF
CaF and CaCO3
|