In compact porous soil, the rising of the water is due to
capillarity
cohesion
adhesion
viscosity
Correct Answer :
A. capillarity
Related Questions
When a bowler spins a ball, it changes its direction in the air. This is due to
turbulence caused by the wind
buoyancy of air
unequal pressures acting on it
sudden change in the direction of the wind
Resistance is measured in
Volts
Amperes
ohms
coulombs
When the earth reaches its perihelion
it is nearest to the moon
it is nearest to the sun
it is nearest to Pluto
it is farthest from the sun
The colour of a star is an indication of its
distance from the earth
age
temperature
size
For an electron orbiting in a hydrogen atom, the necessary centripetal force keeping it in orbit is provided by
the electrical attraction between the negatively charged electron and the positively charged porton
the high speed of the electron
the low speed of the electron
gravity
Sun spots are
the mountains found on the surface of the Sun
the dark patches on the sun having less temperature than the normal sun's surface
ionized gas found near the solar surface
the magnetic storms on the surface of the Sun
The method used to separate aluminium from a alumina is
electroplating
electrotyping
electrolysis
distillation
Tea pots are highly polished
so that they may reflect thermal radiation from outside and minimise such radiation from them
so that they may absorb all radiation from outside
to make them attractive to look at
because they take high polish
The filament used in the electric lamp is made of
nichrome
tungsten
copper
aluminium
Diamond shines because of its
purity
hardness
high density
high refractive index and low critical angle
We see the sun before it actually rises on the horizon. This is due to
refraction
reflection
total internal reflection
parallax
For an electron orbiting in a hydrogen atom, the necessary centripetal force keeping it in orbit is provided by
the electrical attraction between the negatively charged electron and the positively charged porton
the high speed of the electron
the low speed of the electron
gravity
The number of electrons in the outer orbits of a nucleus gives
the mass number
atomic number
atomic weight
absolute number
When light passes from air to glass, its velocity in glass
increases
decreases
remains unchanged
first decreases then increases
Air pressure is usually highest when the air is
warm and moist
cool and dry
warm and dry
cool and moist
Alpha particles are
electromagnetic radiations
helium nuclei
negatively charged particles
neutral particles
The function of a moderator in a nuclear reactor is
to absorb unwanted neutrons
to slow down the fast neutrons to secure more effective hits on other nuclei
to decrease the number of fissile nuclei
to increase the number of fissile nuclei
The sun continuously produces an enormous amount of energy. This la due to
nuclear fission
nuclear fusion
chemical combustion
boiling
The overhead wires supported by high towers in the grid system carry
alternating current of very high frequency
alternating current of very high voltage
a very large direct current
a high voltage direct current
Which of the following revolves round the nucleus in an atom?
protons
electrons
neutrons
positrons
Halley's comet appears in the heavens once in
40 years
50 years
76 years
80 years
Heat is transmitted from one end of a metal rod to its other end by the method of
conduction
convection
radiation
sublimation
The image formed by a plane mirror is
of the same size as the object
at the same distance behind the mirror as the object is in front of it
virtual and laterally inverted
All the above
The stem of a vibrating tuning fork is pressed against a sound box. Then
the loudness of the sound increases
the loudness remains the same
the loudness decreases
the sound suddenly stops
An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or
sugar
sodium carbonate
common salt
carbonates of calcium and magnesium
A heavenly body similar in nature to the sun intensely hot glowing mass that produces its energy by thermonuclear reactions is
a planet
a meteor
a star
a comet
Out of the following, name the fluorescent substance.
quinine sulphate solution
paraffin oil
fluorescein solutions
All the above
A series of east moving still pictures can be made to appear as a moving picture because the eye
can focus very rapidly as pictures change
is quicker than the brain
can see two images separated only if the interval' between seeing them is more than' one-tenth of a second
can shut out some of the light
The light from the star nearest to the sun reaches the earth in
8 minutes
4.3 years
12 seconds
24 hours
The number of galaxies that are visible without telescope on clear dark nights and away from bright lights is
one
two
three
infinite