Ozone saves the biosphere by absorbing high energy radiations called ________ .

A Infra-red (IR)
B Gamma rays
C Ultraviolet rays (UV)
D X–rays

Correct Answer: Ultraviolet rays (UV)

The ozone layer or ozone shield is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet (UV) radiation. It absorbs 97 to 99 percent of the Sun’s medium-frequency ultraviolet light (from about 200 nm to 315 nm wavelength), which otherwise would potentially damage exposed life forms near the surface.
Bissoy MCQ
#General Knowledge #Chemistry

Related Questions

A man saves Tk 20,000 in 10 years. He saves Tk 200 more every year than the previous year, except the first year. How much does he save in the first year?
A 1200 Tk
B 1100 Tk
C 1000 Tk
D 500 Tk
A material capable of absorbing large amount of energy before fracture is known as
A Ductility
B Toughness
C Resilience
D Shock proof
The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from ________
A Troposphere
B Mesosphere
C Stratosphere
D Ionosphere
Of the solar energy coming into the Biosphere, what percentage of it is actually used in the photosynthesis?
A Less than 1
B Between 1% and 15%
C Between 15% and 2%
D More than 2%
Which is best used as a sound absorbing material in partition walls ?
A Stone chips
B Steel
C Glass - wool
D Glass pieces
The shock absorbing capacity of a bolt can be increased by
A Tightening it properly
B Increasing shank diameter
C Grinding the shank
D Making shank diameter equal to core diameter of thread
Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in
A KOH
B Ammoniacal cuprous chloride
C Pyrogallol solution
D None of these
In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing
A CO
B CO2
C O2
D H2O
For absorbing a sparingly soluble gas in a liquid
A Gas side mass transfer co-efficient should be increased
B Liquid side mass transfer co-efficient should be increased
C Liquid side mass transfer co-efficient should be decreased
D Mass transfer co-efficient must be kept constant
Which of the following is an undesirable property for an absorbing solvent?
A Low vapour pressure
B Low velocity
C Low freezing point
D None of these

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