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

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.

None

Which of these is an example of a synthetic polymer?

Natural rubber

Polyvinyl chloride (PVC)

Protein

Cellulose

None

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

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.

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

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

None

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 concrete protects the steel from conducting electricity

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 steel makes the structure lighter and more flexible.

None

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

Steel rods and concrete

Silver chloride and regular glass

Glass fibers and polyester resin (a type of plastic)

Carbon atoms and polymer chains

None

Which of the following pairs correctly matches a natural polymer with its corresponding monomer?

Protein and Glucose

Natural rubber and Amino acid

Protein and Amino acid

Carbohydrate (Starch) and Isoprene

None

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

The atomic scale (less than 1 nanometer)

The nanoscale (1-100 nanometers)

The macroscopic scale (greater than 1 millimeter)

The microscopic scale (1-100 micrometers)

None

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

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

Yttrium barium copper oxide

Polyester resin and glass fibers

Styrene and butadiene monomers

None

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

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

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

They are more transparent but less conductive.

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

None

10.

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

It develops extremely high electrical resistance.

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

It exhibits zero electrical resistance

It becomes a perfect insulator.

None

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