The basics you ought to know
25 important questions on The basics you ought to know
The solubility of gypsum (CaSo2.2H2O,s) decreases with the increase of ionic strength. TRUE/FALSE?
Freundlich model assumes binding to one type of sites and a single value for the binding constant. TRUE/FALSE?
More nitrate than sulphate is generally observed in particles containing soil minerals. TRUE/FALSE?
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When you have NMHC limiting conditions in an urban atmosphere, it is more efficient to reduce the NOx concentration to reduce the peak ozone production. TRUE/FALSE?
Raoult's law describes the relation between the partial pressure of a substance and the dissolution in water. TRUE/FALSE?
The solubility of a mineral will increase with temperatures if the enthalpy of the dissolution reaction is positive. TRUE/FALSE?
The pauling bond valence of Se in SeO4,2- is -2/4 v.u. TRUE/FALSE?
Soil pH measured with water is generally lower than measured in a 0.01 M CaCl2 solution.
The Freundlich model is adequate for systems with chemical heterogeneity. TRUE/FALSE?
In case of a first order chemical loss, the lifetime of a substance in the atmosphere is independent of its concentration.
The alkalinity of pure water without CO2 is zero. TRUE/FALSE?
The Freundlich model is adequate for describing the adsorption of metal ions by OM at a given pH.
Ultra-fine particles have higher deposition velocities than fine aerosol particles. TRUE/FALSE?
Nitrogen dioxide in the atmosphere is a radical.
Binding of hydrophobic chemicals to black carbon is less strong than to amorphous 'soft' carbon.
The standard chemical potential of an electron is zero.
The Langmuir equation is adequate for describing Cu2+ adsorption by humic acids at a fixed pH.
Ions like Na+ and NO3- are generally bound to oxides as innersphere complexes.
Salinization always leads to alkalinization (high pH).
Elimination of CFCs to allow restoratoin of the stratospheric ozone layer, could lead to higher concentrations of the tropospheric pollutants.
The pauling bond valance of S in SO4,2- is -2/4 v.u.
The CEC of soil is pH dependent.
He ionic strenght I of a 0.01 M CaCl2 solution is 0.01 M.
The normalized ion exchange isotherm of XCa1/2 --> XK is typically salt concentratoin dependent.
Carbon monoxide is the most abundant emitted gas in urban air and therefore contribues to a large extent to urban smog formation.
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