Gypsum is added to cement clinker to
1 Increase the tensile strength of cement
2 Bind the particles of calcium silicate
3 Decrease the rate of setting of cement
4 Facilitate the formation of colloidal gel
Which of the following shows the masses of three elementary
particles in decreasing order?
1 Mesons, Baryons, Leptons
2 Leptons, Baryons, Mesons
3 Baryons, Mesons, Leptons
4 Leptons, Mesons, Baryons
The main important feature of neutron bomb is that when it
is dropped on a city, it would damage
1 Both the living organisms and buildings
2 The buildings but not the living organisms
3 The living organisms but spare buildings
4 None of these
Enriched uranium used in a nuclear reactor is
1 Uranium freed of all impurities
2 Uranium treated with radiation
3 Uranium alloyed with aluminum
4 Uranium with a high percentage of a particular isotope
‘No two electrons in an atom can have the same set of four
quantum numbers’ is
1 Bohr’s law
2 Aufbau principle
3 Newton’s law
4 Pauli’s exclusion principle
The correct sequence of various regions I absorption spectrum is
1 Visible, ultraviolet, microwave, infra red
2 Infra red, gamma rays, ultraviolet, microwave
3 Ultra violet, visible, infra red, microwave
4 None of these
The dark lines in the solar spectrum are due to
1 Absorption of corresponding wavelengths by the prism used
in he spectrograph
2 Destructive interference between waves of certain definite
wavelengths
3 Absorption of corresponding wavelengths by the outer
layers of the sun
4 None of these
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