Advertisements
Advertisements
Question
Give reason.
Acidic soil is treated with quick lime.
Advertisements
Solution
If the soil is acidic it can be treated with base like quick lime, to make it neutral.
APPEARS IN
RELATED QUESTIONS
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
How is precipitate formation in a chemical reaction indicated?
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
Differentiate between in Chemical reaction and chemical equation.
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
State four conditions necessary for a chemical reaction to take place.
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
When electric current is passed through acidulated water ______ of water takes place.
Define the following term:
Precipitate
Give an example of a reaction where the following are involved:
Solution
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 |
What do you observe when HCI is passed through a silver nitrate solution.
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.
Circle the odd one out. Give reason for your choice
NPK are the primary nutrients for plants.
______ is the chemical name of slaked lime.
