Questions

Secondary pollutants include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight.

Whereas Primary pollutant are those pollutants that are directly emitted from their sources, like CO2, CO, SO2 as these gases are directly emitted form burning of fossil fuels.

Acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water, sulfuric acid etc.

Hence, Acidrain is a secondary air pollutant.

Yes, the given statement that water is more dense than cooking oil is TRUE as water more denser than oil it is sinked when it is poured in oil.

High level data models provide the concepts that are close to the way many users perceive data

True, the carbon in the ocean originates from the atmosphere. The oceanic surface water absorbs the carbon dioxide gas from the atmosphere and dissolves in it.

“Verify Scope is the process of formalizing acceptance of the completed project deliverables. Verifying scope includes reviewing deliverables with the customer or sponsor to ensure that they are completed satisfactorily and obtaining formal acceptance of deliverables by the customer or sponsor.” PMBOK [5.4]