Advertisements
Advertisements
प्रश्न
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 ______.
विकल्प
visible region.
infrared region.
ultraviolet region.
microwave region.
Advertisements
उत्तर
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
संबंधित प्रश्न
If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
To which part of the electromagnetic spectrum does a wave of frequency 5 × 1019 Hz belong?
Give a reason for the following:
It is necessary to use satellites for long-distance TV transmission. Why?
Optical and radio telescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why?
Which radiation is used for satellite communication?
What is the range of the wavelength of the following electromagnetic waves?
(a) Gamma rays.
Which part of electromagnetic spectrum is used in radar systems?
Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?
The X-ray beam emerging from an X-ray tube
What potential difference should be applied across an X-ray tube to get X-ray of wavelength not less than 0.10 nm? What is the maximum energy of a photon of this X-ray in joule?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
The Kα X-rays of aluminium (Z = 13) and zinc (Z = 30) have wavelengths 887 pm and 146 pm respectively. Use Moseley's law √v = a(Z − b) to find the wavelengths of the Kα X-ray of iron (Z = 26).
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the scientist who discovered Infra-red waves
Find the photon energy in units of ev for electromagnetic wave if waves length 40 m. Given h = 6.63 × 10–34 J.
Identify the electromagnetic wave whose wavelength range is from about 10-3 m to about 10-1 m. Write one use of this.
In \[c = \nu\lambda\], what do \[c\], \[\nu\], and \[\lambda\] represent?
Which set lists uses of ultraviolet rays?
What can result from excess ultraviolet exposure?
What gives rise to gamma rays?
