Teeth and Bones acquire strength and rigidity from
fluorine
chlorine
sodium
calcium
D.
calcium
Coating of solid waste with impervious material is known as
chemical fixation
landfill
capping
encapsulation
The concept of 'Green House Gases' was postulated by
Joseph Furier
Abdul Kalam
M S Swaminathan
Richael Carlson
The ordinary and maximum tolerance limit of sound by human being is
50 db to 70 b
60 db to 80 db
65 db to 75 db
70 db to 85 db
The pollutants which move downward with percolating groundwater are called
Leachates
Pollutates
Earthites
Percolates
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in
Raman spectra
Absorption spectra
Emission spectra
Fluroescence
A person can jump higher on the Moon's surface than on the Earth because
the acceleration due to gravity in Moon is smaller than that on the Earth
the Moon has no atmosphere
the Moon's surface is rough
the Moon is cooler than Earth
The purpose of choke in a fluorescent lamp is
to decrease the current flow
to decrease the voltage momentarily
to decrease the resistance
to increase the current flow