Kuiz Sains Tambahan Tingkatan 5 Bab 5 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 5 Set 1

Kimia Bahan (English)

KUIZ INI MENGANDUNGI 10 SOALAN

Nylon, commonly used for ropes, carpets, and clothing, is a synthetic copolymer. What does this imply about its monomer composition?

It is formed from two different types of monomers, hexanedioic acid and hexamethylene diamine.

It is made from a single, complex monomer called ‘nylonene’

It is a modified version of the natural polymer, protein.

It is made from repeating units of the natural monomer isoprene.

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Why are carbon nanotubes considered a superior material for touch screen devices compared to the traditionally used tin oxide?

They are more transparent but less conductive.

They are heavier and more rigid, making the screen less likely to break

They have better mechanical properties and sensitivity at a lower cost.

They are able to store more electrical charge, increasing battery life.

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How do fiber optic cables transmit information, making them advantageous over traditional copper wires?

They use superconductive materials to send electrical signals with zero loss.

They transmit data as signals of light, allowing for higher speed and capacity

They use magnetic pulses, which are not affected by electrical interference.

They vibrate at high frequencies to transmit data acoustically.

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Reinforced concrete, used in bridges and skyscrapers, is a composite material made of concrete and steel rods. Why is this combination superior to concrete alone?

The steel prevents the concrete from ever cracking.

The steel provides tensile strength, allowing the structure to support larger loads and resist forces like vibration.

The concrete protects the steel from conducting electricity

The steel makes the structure lighter and more flexible.

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What is the fundamental difference between a polymer and a copolymer?

A polymer is formed through addition polymerization, while a copolymer is formed through condensation polymerization.

A polymer is a long-chain molecule, whereas a copolymer is a short-chain molecule.

A polymer consists of a single repeating monomer unit, while a copolymer is formed from more than one type of monomer.

A polymer is made of natural monomers, while a copolymer is made of synthetic monomers.

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What is the defining characteristic of a superconductor when it is cooled below its critical temperature?

It exhibits zero electrical resistance

It becomes a perfect insulator.

It converts electrical energy into heat energy with 100% efficiency.

It develops extremely high electrical resistance.

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The development of nanoscience and nanotechnology, which produced materials like carbon nanotubes, involves working at what scale?

The nanoscale (1-100 nanometers)

The microscopic scale (1-100 micrometers)

The macroscopic scale (greater than 1 millimeter)

The atomic scale (less than 1 nanometer)

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The text identifies a major environmental issue with the disposal of advanced materials in electronic products. What is a primary reason that electronic waste (e-waste) is so harmful?

It is highly radioactive and requires specialized containment.

It absorbs a large amount of water, leading to soil dehydration.

It is often disposed of through open burning, which releases toxic gases.

It biodegrades too quickly, releasing nutrients that upset ecosystems.

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Carbon nanotubes are utilized in advanced water filters. What function do they perform in this application?

They act as a membrane to physically block microorganisms and heavy metals.

They add beneficial carbon minerals to the water.

They increase the water pressure to speed up the filtration process

They chemically neutralize all contaminants in the water.

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10.

Which of these is an example of a synthetic polymer?

Cellulose

Polyvinyl chloride (PVC)

Natural rubber

Protein

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