Materials and Their Applications

Jade is exceptionally tough (resistant to breaking) compared to other stones, which is why ancient cultures used it for tools, weapons, and implements that required durability. Its toughness comes from its interlocking crystalline structure. While diamond is harder, jade is tougher - meaning it resists fracture and chipping better, making it ideal for functional objects.

The correct answer is C (Animal bladders). Before rubber and latex, early balloons were made from animal bladders (often pig or other animals), cleaned and inflated. This dates back centuries. Neither papyrus, rubber, nor gum resin were the earliest materials used for balloons.

Pencil 'lead' (the writing core) is made of graphite mixed with clay, not actual lead. Graphite leaves the mark on paper while clay acts as a binder to control hardness.

Chevrolet Corvette bodies are made of fiberglass, a composite material that was revolutionary when introduced. Fiberglass is lighter than traditional steel and allows for more design flexibility while maintaining strength, making it ideal for sports cars.

The Dilwara Jain temples at Mount Abu are renowned for their exquisite marble architecture. Built between 11th-13th centuries CE, these temples feature intricate carvings on white marble and are considered masterpieces of Western Indian architectural style.

Silicon carbide is an extremely hard material (hardness ~9.5 on Mohs scale) and is widely used as an abrasive for cutting and polishing very hard substances including metals, ceramics, and other materials. It is also used in making cutting tools and grinding wheels.

Pencil 'lead' is actually made of graphite, which is a form of carbon. Charcoal is also carbon but used for different purposes. Silicon is used in electronics and phosphorus is a chemical element with other applications.

Tulip, Flute, and Balloon are classic shapes/styles of wine glasses used for different types of wine. They're not types of computer viruses, opera, or Coca-Cola bottles. These glass shapes are designed to enhance the aroma and taste of specific wines.

The official Ashes trophy introduced in 1998-99 is made of Waterford Crystal, an Irish crystal known for its clarity and quality. It's not made of precious metals like gold or silver, nor terracotta which is a clay material.

Pyrex glass is heat-resistant due to its low thermal expansion coefficient, which prevents it from cracking under rapid temperature changes. It contains boron oxide (borosilicate glass) that gives it these properties, making it ideal for laboratory and kitchen use.

Graphite is the odd one out because it is the only non-metallic element in pure form among the options. Diamond is a crystalline form of carbon but has a different structure. Mica and asbestos are silicate minerals. However, the key distinction is that graphite is an allotrope of carbon with electrical conductivity, while the others are insulators or have different properties. The most likely classification is that graphite is conductive while the others are not.

Elasticity is measured by how well a material returns to its original shape after deformation. Steel has a higher modulus of elasticity and can undergo larger elastic deformation than rubber, which stretches easily but doesn't fully recover.

Paper is measured in reams (typically 500 sheets) for quantity and caliper for thickness, expressed in thousandths of an inch or micrometers. This dual measurement system reflects how paper is manufactured and used in printing. Other listed materials use different units like troy ounces or liters.

Salt is crucially used in leather making during the curing process to preserve hides and prevent bacterial decay before tanning. It draws out moisture and stabilizes the raw material.

A rhino's horn is made of keratin, the same protein that forms human hair and fingernails. It's not bone, tusk, or any other material.