Water

Question 1

Saturated solution

Answer 1

Solution that cannot be dissolved any more solute at a given temperature.

Question 2

Unsaturated solution

Answer 2

A solution where most solute can be dissolved in solvent at a given temperature.

Question 3

Supersaturated solution

Answer 3

A solution that can hold more solute buy increasing the temperature.

Question 4

Dilute solution

Answer 4

It is the solution in which the amount of solute is rather less compared to the amount of solvent.

Question 5

Concentrated solution

Answer 5

It is a solution in which amount of solvent is relatively more than given amount of solvent.

Question 6

Solubility

Answer 6

The amount of solute that dissolves in a solvent from a saturated solution at a particular temperature.

Question 7

Sparkling soluble

Answer 7

A substance having high solubility such as sodium chloride.

Question 8

What are the factors affecting solubility?

Answer 8

*size of solute particles
* stirring
* temperature

Question 9

Few examples of solubility

Answer 9

Potassium nitrate, sodium nitrate, calcium sulphate, potassium and sodium bromide chloride and sulphate.

Question 10

What is Henry’s law?

Answer 10

At a given temperature a gas is dissolved by a fixed volume of liquid directly proportional to the pressure of the liquid.

Question 11

Crystal and crystalline

Answer 11

It is a homogeneous substance definite geometry cal shape. And it is a process by which crystals are created by cooling a hot saturated solution.

Question 12

Examples of crystalline

Answer 12

Cubic, prismatic, rhombohedric and few others.

Question 13

Hydrated substance.

Answer 13

A substance which loses its water of crystallization by taking in dry air.

Question 14

Water of crystallization

Answer 14

water that is chemically bound to a crystal. It is also known as water of hydration.

Question 15

Few examples of water of crystallization

Answer 15

Washing soda, epsom salt, potash alum, Globus salt, blue vitriol, green vitriol and white vitriol.

Question 16

Anhydrous substance

Answer 16

A substance is contains no water and offend applied to crystalline substance when water of crystallization is removed.

Question 17

Efflorescence

Answer 17

AF phenomena where a compound loses its water of crystallization on exposure to dry air is called the fluorescence. For example washing soda and epsom salt.

Question 18

Deliquescence

Answer 18

Deliquescence is the process by which a solid substance absorbs moisture from the air until it dissolves into a solution.

Question 19

Few examples of efflorescence and deliquescence.

Answer 19

Efflorescence: washing soda, Glauber’s salt and epsom salt.
Deliquescence: caustic soda, caustic potash, magnesium, zinc, calcium, ferric chlorides.

Question 20

Hygroscopy

Answer 20

Certain substance absorb moisture from the atmosphere when they are exposed to it but not enough from solution.

Question 21

Examples of hygroscopic substances

Answer 21

Anhydrous calcium chloride
Sodium hydroxide
Ferric chloride
Calcium oxide Concentrated sulfuric acid
Silica gel

Question 22

What are drying agents?

Answer 22

Drawing agents are the substance that can readily absorb moisture from other substances without a chemical change. Few example: zinc chloride, Phosphorus pentoxide, calcium chloride, magnesium sulphate and dry sodium sulphate

Question 23

Dehydrating agents

Answer 23

Dehydrating agents are substance that can remove event the chemically combined water molecules from the compound.

Question 24

Hard water

Answer 24

Hardness in water is due to the presence of carbohydrates chloride and sulphate of calcium or magnesium. Water is said to be hard when it does not readily forms lather with soap.

Question 25

soft water

Answer 25

Water is said to be soft when it readily forms lather with soap.

Question 26

How many types of hardness are there in water. And define them.

Answer 26

Permanent hardness- Permanent hardness of water is the mineral content of water that cannot be removed by boiling. It's caused by the presence of calcium and magnesium chlorides and/or sulphates in the water. Temporary hardness- water that contains coal me hydrogen carbonate and bicarbonate of calcium and magnesium is called temporary hardness.

Question 27

What is the true solution. Guess you factors about it.

Answer 27

A true solution is a homogeneous mixture of two or more substances where the solute particles are completely dissolved in the solvent. Few factors are as follows:- ★it is a homogeneous mixture. ★clear and transparent. ★it does not scatter light. ★lastly it cannot be separated by filtration.

Question 28

What are the physical properties of water.

Answer 28

★nature colourless odourless and tasteless. ★boiling point 100 degree Celsius. ★freezing point zero degree celsius ★anomalous expansion of water is a physical property where what are expands till 4 degree Celsius as soon as it reaches 4 degree Celsius it starts to freeze. ★latent heat of fusion of ice ★latent heat of vaporization of water.