Advertisements
Advertisements
प्रश्न
What do you observe? When
Water is added to the quick lime.
Advertisements
उत्तर
Quick lime reacts vigorously with water to produce slaked lime, i.e. calcium hydroxide.
APPEARS IN
संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Fill in the blank:
The substances which undergo chemical change are called _______
Define a photochemical reaction.
Complete the following table and write your observations.
|
Hydrogen sulphide |
Ammonia |
Sulphur dioxide |
Hydrogen chloride |
|
|
Shake the gas with red litmus solution |
||||
|
Shake the gas with blue litmus solution |
||||
|
Apply a burning splint to a gas |
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Give a suitable example with an equation to show the representation of a chemical reaction.
Chemists identify gypsum as a natural indicator.
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
