Tag: chemistry

Questions Related to chemistry

The amount of the solute present in the saturated solution at a particular temperature is called its :

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

  1. solubility

  2. saturation

  3. solvent concentration

  4. none of the above

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Correct Option: A
Explanation:

At any particular temperature, a solution that has dissolved as much solute as it is capable of dissolving is said to be a saturated solution.


The amount of solute present in the saturated solution at this temperature is called its solubility.

Hence, option A is correct.

Which of the following is translucent?

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

  1. Copper

  2. Wood

  3. Butter paper

  4. Glass

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Correct Option: C
Explanation:

The material through which light can pass partially is called translucent, e.g. butter paper, thin curtain, tinted glass etc.

Find the odd man out in terms of material it is made of:

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

  1. Rubber

  2. Gold

  3. Coal

  4. Chalk

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Correct Option: B
Explanation:

Coal, chalk and rubber all are non-metals but gold is metal with lustre and is the good conductor of heat and electricity whereas non-metals are bad conductors of heat and electricity.

Which of the following has dull appearance?

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

  1. Gold foil

  2. Aluminium foil

  3. Steel rod

  4. Bricks

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Correct Option: D
Explanation:

The appearance of an object depends on color, hardness, texture, and luster of its material. Materials which are made up by non-metals have dull appearance eg. bricks.

Select the metal which is hardest among the following:

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

  1. silver

  2. gold

  3. platinum

  4. aluminium

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Correct Option: C
Explanation:

As the size of the metal increases, they become harder.

So, size of the metals- $Al < Ag < Au < Pt$
As we move across the period size decreases hence $Pt>Au$. 
$\therefore$ $Pt$ is hardest.

Which among the following is the softest metal?

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

  1. Platinum

  2. Silver

  3. Iron

  4. Aluminium

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Correct Option: D
Explanation:

As the size of the metal increases its softness decreases.

So, the increasing size of the given metals-
$Al < Fe < Ag < Pt$
Hence, $Al$ is the softest metal among these.

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

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

  1. naturally available

  2. cheap

  3. an electrical insulator

  4. soft and flexible

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Correct Option: D
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.

Which of the following is lustrous?

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

  1. Steel furniture

  2. Wooden furniture

  3. Plastic chair

  4. Football

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Correct Option: A
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.

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?

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

  1. Wood and wool

  2. Plastic and steel

  3. Wool and steel

  4. Steel and wool

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Correct Option: D
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.

Find the odd one out on the basis of the appearance of an object.

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

  1. Paper

  2. Cardboard

  3. Iron

  4. Playing cards

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Correct Option: C
Explanation:

Paper cardboard,playing cards can be tampered or burnt i.e the level of hardness of these three objects is very low  while iron is very hard and cannot be tampered by bare hands.