Science Quiz REVISION

Natural gas consists of several gases, the most important one is methane and a small percentage of.... and gases

• carbon dioxide - hydrogen, oxygen

• ethane - carbon dioxide - propane

• propane - butane - hydrogen

• ethane - propane - butane

Thermos represents .............................................. thermal system.

• open

• closed

• isolated

• all of the above

In the isothermal process, the temperature does not change, and therefore..............

• delta U = AQ

• delta W = zero

• delta Q = zero

• delta U = zero

A mole of water ......... (Knowing that H = 1, O = 16)

• 17 g

• 18 g

• 20 g

• 22 g

The ability of blood hemoglobin to bind to carbon monoxide gas is .... times greater than its ability to bind to oxygen.

• 100

• 200

• 210

• 220

H₂SO₄ + CaCO3 →........ +................

• CaCO3 + SO2 + H₂O

• CaSO4 + H₂O + CO₂

• SO₂ + H₂CO₃ + H₂

• H₂CO₃ + H₂O + SO3

One of the negative environmental impacts of the release of SO2 into the atmosphere is...

• improving air quality

• reducing global warming

• increasing atmospheric oxygen

• forming acid rain

The process of ...........analysis is used to extract aluminum form bauxite ore

• Chemical

• Electrical

• Photo

• Thermal

What is the first step in the chemical waste disposal process?

• Burning waste in high-temperature furnaces

• Storage of waste in private landfills

• Classification and separation of waste according to type

• Monitoring of sites used for final disposal

Solar cells consist of........... that converts the solar energy directly into electrical energy

• semi-conductors

• conductors

• metals

• nonmetals