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

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

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

They vibrate at high frequencies to transmit data acoustically.

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

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

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

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

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

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

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

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

The microscopic scale (1-100 micrometers)

The atomic scale (less than 1 nanometer)

The macroscopic scale (greater than 1 millimeter)

The nanoscale (1-100 nanometers)

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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 develops extremely high electrical resistance.

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

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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 makes the structure lighter and more flexible.

The concrete protects the steel from conducting electricity

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

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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 biodegrades too quickly, releasing nutrients that upset ecosystems.

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

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Fiberglass is a composite material valued for being strong, lightweight, and corrosion-resistant. What are its two primary components?

Steel rods and concrete

Carbon atoms and polymer chains

Glass fibers and polyester resin (a type of plastic)

Silver chloride and regular glass

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Styrene-butadiene rubber is used to make vehicle tires. Based on its name and the provided text, what type of material is it?

A natural polymer

A ceramic composite

A copolymer

A superconductor

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Photochromic glass, which darkens in sunlight, is created by adding which substances to regular glass?

Styrene and butadiene monomers

Yttrium barium copper oxide

Silver chloride (or silver bromide) and copper(II) chloride

Polyester resin and glass fibers

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10.

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 have better mechanical properties and sensitivity at a lower cost.

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

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

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