Materials Around Us_Quiz

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Question 1 of 9

1. Question

Which property is possessed by ALL materials without exception?

(a) Hardness
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(b) Transparency
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(c) Lustre
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(d) Mass and volume Explanation: Mass and volume are the two fundamental properties that ALL materials possess. This is what makes them "matter" – anything that occupies space (volume) and has mass. Other properties like hardness, transparency, and lustre are specific to certain materials but not universal. For example, not all materials are hard (sponge is soft), not all are transparent (wood is opaque), and not all have lustre (paper is non-lustrous).
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Question 2 of 9

2. Question

A student wants to make a container for storing water. Which property is MOST important for the material selection?

(a) The material should be lustrous
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(b) The material should be hard
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(c) The material should be insoluble in water Explanation: For storing water, the material must not dissolve in water (be insoluble), otherwise the container itself would dissolve and disappear. This is the most critical property. While hardness helps with durability and transparency helps with visibility, a container made of soluble material (like sugar or salt) would completely dissolve, making it impossible to store water. Materials like glass, plastic, or metal are insoluble and suitable for water containers.
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(d) The material should be transparent
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Question 3 of 9

3. Question

Which of the following materials would be classified as translucent?

(a) Clear window glass
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(b) Wooden door
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(c) Frosted bathroom glass Explanation: Translucent materials allow light to pass through but scatter it, making objects behind appear blurry or unclear. Frosted glass is a perfect example – you can see light through it but cannot clearly see objects behind it, providing privacy while allowing light. Clear window glass (a) is transparent, wooden door (b) and metal sheet (d) are opaque as they don't allow light to pass through at all.
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(d) Metal sheet
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Question 4 of 9

4. Question

When sugar is mixed with water and stirred, the sugar disappears. This demonstrates that sugar is:

(a) Transparent
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(b) Soluble in water Explanation: When a material completely disappears upon mixing with water (like sugar), it shows that the material is soluble in water. The sugar molecules dissolve and spread uniformly throughout the water, forming a solution. This property is called solubility. The fact that sugar disappears has nothing to do with transparency, hardness, or lustre – these are completely different properties related to light transmission, resistance to scratching, and shininess respectively.
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(c) Hard
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(d) Lustrous
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Question 5 of 9

5. Question

Which of the following pairs shows materials with OPPOSITE transparency properties?

(a) Glass and water
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(b) Wood and metal
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(c) Clear glass and wooden board Explanation: Clear glass is transparent (allows clear vision through it) while wooden board is opaque (doesn't allow any light or vision through it). These represent opposite ends of the transparency spectrum. Option (a) – both glass and water are transparent; option (b) – both wood and metal are opaque; option (d) – both frosted glass and butter paper are translucent. Only option (c) shows materials with truly opposite transparency properties.
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(d) Frosted glass and butter paper
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Question 6 of 9

6. Question

According to the ancient Indian system of Ayurveda, materials were classified using:

(a) 10 single properties
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(b) 20 properties arranged in 10 pairs of opposites Explanation: The Ayurvedic system used 20 properties (called gunas) arranged in 10 pairs of opposites to describe all physical matter. Examples include: Heavy↔Light, Cold↔Hot, Smooth↔Rough, Solid↔Liquid, Soft↔Hard, etc. This was a sophisticated classification system that considered the relative and balanced nature of properties, much like modern science recognizes that properties are often relative (e.g., rubber is harder than sponge but softer than iron).
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(c) 5 basic elements only
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(d) Modern scientific methods
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Question 7 of 9

7. Question

A cricket ball and a tennis ball of the same size behave differently when dropped. This is primarily due to difference in their:

(a) Color
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(b) Material properties Explanation: Cricket balls and tennis balls are made of different materials with different properties. A cricket ball is made with a hard cork/rubber core covered with leather, making it hard and dense with low bounce. A tennis ball has a hollow rubber core with felt covering, making it lighter and more bouncy. The difference in bouncing behavior is due to the different materials used and their properties like hardness, density, and elasticity, not color, shape, or age.
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(c) Shape
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(d) Age
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Question 8 of 9

8. Question

Which statement about lustre is INCORRECT?

(a) Metals generally have lustre
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(b) All shiny materials are metals Explanation: This statement is incorrect. While metals generally have lustre (shiny surfaces), not all shiny materials are metals. Many non-metallic materials can be made shiny through polishing, coating with plastic, wax, or other treatments. For example, polished wood, glossy paint, shiny plastic surfaces, etc. can appear lustrous but are not metals. The saying "All that glitters is not gold" applies here – appearance can be deceiving, and lustre alone doesn't determine if something is metal.
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(c) Lustre means having a shiny surface
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(d) Some metals may lose their lustre due to air and moisture
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Question 9 of 9

9. Question

The process of making ORS (Oral Rehydration Solution) demonstrates the property of:

(a) Transparency of water
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(b) Solubility of sugar and salt in water Explanation: ORS preparation involves dissolving sugar (6 teaspoons) and salt (½ teaspoon) in water (1 liter). This works because both sugar and salt are soluble in water – they dissolve completely to form a uniform solution that the body can easily absorb. The dissolved sugar provides energy while dissolved salt replaces lost electrolytes. If sugar and salt were insoluble, they would remain as separate particles and wouldn't be effective for rehydration. This practical application directly demonstrates the life-saving importance of understanding solubility properties.
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(c) Hardness of salt crystals
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(d) Volume of water
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