1. Catalytic converters are intended to reduce _____smog 2. The gas present in g
ID: 96412 • Letter: 1
Question
1. Catalytic converters are intended to reduce _____smog
2. The gas present in greatest volume in dry air at sea level is______
3. The major source of ______ radiation is radon and other natural radiation sources
4. The collision of particles from solar flares with molecules and atoms in the upper atmosphere ________
5. What is the opposite of photosynthesis?
6. Cl is a _______ in the destruction of ozone
7. Ozone is formed in the atmosphere by the combination of oxygen molecules with ______ atoms
8. "________" gases trap heat neat the Earth's surface by absorbing ultraviolet radiation.
9. Marble, limestone and steel can all be attacked by ________rain.
Explanation / Answer
1. Catalytic converters are intended to reduce photochemical smog.
Here, Photochemical smog refers to the release of large quantities of pollutants in atmosphere after the burning of fossil fuels by automobiles, power plants and industries. These when are intensely exposed to the sunlight form a smog. Smog originally refrs to a mixture of smoke and fog. the smog may contain particulate matter, tropospheric ozone, nitrogen dioxide and sulphur dioxide.
A catalytic converter are pollution reducing units installed in vehicles. These are of two types viz., two-way converter and three-way converter. A catalytic converter breaks down the harmful molecules released by the engine into gases that are more safe like steam and nitrogen, oxygen and carbon dioxide. in a catalytic converter a catalyst is used like platinum or palladium or rhodium which can be easily introduced into the environment.
2. The atmosphere contains a mixture of gases. The composition of dry air at sea level (according to Bolz and Tuve, 1973) is-
Nitrogen - 78.03 volume %
Carbon dioxide- 20.99 volume %
Oxygen - 0.03 volume %
Hydrogen - 0.01 volume %
monoatomic gases (Rn, Ar, Ne, etc.) - 0.94 volume %
Thus, the gas present in greatest volume in dry air at sea level is NITROGEN (78.03%).
3. Background radiation is a constant source of ionizing radiation present in the environment, etc.
Certain radiations that have a tendency to knock out electrons from their orbits in an atom result in the positive charge of the atom. such electrically charged atoms are called ions and such radiations taht produce ions are called Ionizing radiations.
Examples of these include neutrons, alpha and beta particles and gamma or X rays.
Elements that are unstable and continuously disintegrate and emit ionizing radiations are called radionuclides.
Radon is a radioactive gas which is both colorless and odorless. it is generally released due to natural radioactive decay of Uranium which naturally occurs in rocks and soil.
Thus, the major source of Background radiation is Radon and other natural radiation sources.
4. The collision of particles from solar flares with molecules and atoms in the upper atmosphere results in the formation of Auroras.
When highly energetic electrically charged particles accelerate in speed along the magnetic lines of the magnetic feild into the upper atmosphere they tend to collide with the gaseous atoms (which in the case of Sun are Hydrogen atoms) and in the process light is emitted giving out the characteristic Aurora around the Sun.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.