chapter 3 Quiz

Converting food remains into organic fertilizer with the help of microorganisms represents

• mechanical recycling

• energy recycling

• pyrolysis

• chemical recycling

The electricity used in the electrolysis of water to produce green hydrogen is called green electricity because of

• its low cost

• its high efficiency

• its production from renewable energy resources

• its production from non-renewable energy resources

A student mentioned some of the methods used to produce green hydrogen from water, as follows:

(I) Water electrolysis by using renewable energy resources.

(II) Water analysis in the absence of oxygen by using Enterobacter bacteria.

(III) Separating (splitting) water into hydrogen and oxygen in the absence of sulphur by using Chlamydomonas alga.

Which of these methods are correct?

• Methods (I) and (II).

• Methods (II) and (III).

• Methods (I) and (III).

• The three methods.

A student mentioned several examples of waste recycling, as follows:

(I) Separating gold and copper from electronic waste.

(II) Decomposing expired medicines into harmless compounds.

(III) Melting used aluminum and reshaping it.

Which of these examples are correct examples of chemical recycling?

• (I) and (II).

• (I) and (III).

• (II) and (III).

• (I), (II) and (III).

Which of the following metals can be separated using magnetic separation techniques?

• Gold from rocks.

• Iron from sand deposits.

• Aluminum from bauxite ore.

• Copper from limestone deposits.

Green hydrogen is distinguished from gray hydrogen by

• Its production is free of carbon emissions

• It requires a smaller amount of electrical energy for its production

• It needs to be treated before being used as fuel

• It is easy to be transported

When a mixture of polypropylene plastic and aluminum is exposed to an electric field, they

• acquire similar charges

• do not acquire any electrical charge

• acquire opposite charges

• The answer cannot be determined

Recycling processes generally contribute to

• an increasing amount of waste

• increasing overuse of natural resources

• increasing environmental pollution

• saving energy

What is the primary benefit of using green hydrogen as a fuel source?

• It is easier to store than natural gas

• It produces no carbon emissions when burned

• It is cheaper than fossil fuels

• It can be produced from nuclear energy

Which of the following processes is NOT a method of recycling?

• Reusing old newspapers

• Composting organic waste

• Incinerating plastic waste

• Melting down glass bottles