Tag: properties of materials

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Questions Related to properties of materials

Multiple choice chemistry nature of things properties of materials grouping and classification of objects sorting materials into groups

Most balloons, tires, and footballs are made of rubber. This is because rubber is:

  1. naturally available

  2. cheap

  3. an electrical insulator

  4. soft and flexible
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rubber is a ploymer which a naturally available cheap ploymer which is extracted from rubber trees.It is used to prepare ballons,tires and footballs because rubber is both soft and flexible.

Multiple choice chemistry nature of things properties of materials grouping and classification of objects sorting materials into groups

Which of the following is lustrous?

  1. Steel furniture

  2. Wooden furniture

  3. Plastic chair

  4. Football
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Different objects look different from each other according to their material they are made from. The appearance depends on color, hardness, texture, and lustre.  Metals are lustrous due to free electrons on their surfaces. Hence materials made of metals have lustre.

Multiple choice chemistry nature of things properties of materials grouping and classification of objects sorting materials into groups

You are provided with the following four materials as wood, plastic, wool and steel. Which of the given material will you identify as hardest and softest respectively?

  1. Wood and wool

  2. Plastic and steel

  3. Wool and steel

  4. Steel and wool
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Materials which are difficult to compress are called hard and materials which are easy to compress are called soft.

Hard materials :Steel,wood,etc.
Soft materials :Wool,cotton etc.
Here steel >wood>wool [hardness]
So,steel is hardest and wool is soffest.

Multiple choice evs sorting materials into groups properties of materials grouping and classification of objects nature of things

Kerosene floats on water because :

  1. kerosene has more density

  2. kerosene has less energy

  3. densities of water and kerosene are equal

  4. water has more density
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water is denser than kerosene. The density of water is $1000kg/m^3$ and kerosene is $810kg/m^3$

when something is less dense than the water then it floats on water. Thus kerosene floats on water.

Option D is correct.