Advertisements
Advertisements
Question
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ______.
Options
visible region.
infrared region.
ultraviolet region.
microwave region.
Advertisements
Solution
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ultraviolet region.
Explanation:
Given energy required to dissociate a carbon monoxide moleule into carbon and oxygen atoms E = 11eV
We know that E = hv, where h = 6.62 × 10–34 J – s
v = frequency
⇒ 11 eV = hv
⇒ ` v = (11 xx 1.6 xx 10^-19)/(6.62 xx 10^-34) J`
= `2.65 xx 10^15` Hz
This frequency radiation belongs to ultraviolet region.
APPEARS IN
RELATED QUESTIONS
If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
Use the formula λm T= 0.29 cm K to obtain the characteristic temperature ranges for different parts of the electromagnetic spectrum. What do the numbers that you obtain tell you?
What is the range of the wavelength of the following electromagnetic waves?
(a) Infrared.
What is the range of the wavelength of the following electromagnetic waves?
(a) Micro waves .
Give one use of microwaves.
Frequencies of Kα X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency v and the atomic number Z ?
For harder X-rays,
(a) the wavelength is higher
(b) the intensity is higher
(c) the frequency is higher
(d) the photon energy is higher.
The short-wavelength limit shifts by 26 pm when the operating voltage in an X-ray tube is increased to 1.5 times the original value. What was the original value of the operating voltage?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
The electron beam in a colour TV is accelerated through 32 kV and then strikes the screen. What is the wavelength of the most energetic X-ray photon?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the radiations used for the detection of fracture in bones.
Choose the correct option.
The EM wave emitted by the Sun and responsible for heating the Earth’s atmosphere due to greenhouse effect is
Answer briefly.
What is a carrier wave?
Which of the following is a tool used for separating the different color wavelengths from each other?
Microwaves are electromagnetic waves with frequency in the range of.
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is ______.
Why does microwave oven heats up a food item containing water molecules most efficiently?
Photons of an electromagnetic radiation has an energy 11 keV each. To which region of electromagnetic spectrum does it belong?
What happens when an electron collides with a positron?
