हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Give Reason. Acidic Soil is Treated with Quick Lime.

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प्रश्न

Give reason.

Acidic soil is treated with quick lime.

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उत्तर

If the soil is acidic it can be treated with base like quick lime, to make it neutral.

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अध्याय 6: Chemical Reactions - Exercise 2 [पृष्ठ ८६]

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एस पी सिंग Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 2 | Q 8.2 | पृष्ठ ८६

संबंधित प्रश्न

The chemical name of baking soda is ______.


How do the following help in bringing about a chemical change?

heat. 


Fill in the blanK

 A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.


Write the missing reactants and products and balance the equations.

\[\ce{KClO3 ->[heat]}\] ___________+ ____________


True or false 

New substances are formed in a chemical change.


 Fill in the blank

A change in which the substance can be brought back to its original state is called a _______ change.


Write true or false .
A black residue is formed when sugar is heated .


Match the pairs.

a. Photosynthesis i.  Tendency to lose electrons
b. Water ii.  Reactant in combustion process
c. Sodium chloride iii.  Chemical change
d. Dissolution of salt in water  iv.  Covalent bond
e. Carbon v.  Ionic bond
f. Fluorine vi.  Physical change 
g. Magnesium vii.  Tendency to form anion

Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition) 

The conversion of ferrous sulphate to ferric sulphate is ______ reaction. 


Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.


What do you observe when Cobalt chloride paper is introduced in water vapour.


Distinguish by dilute sulphuric acid.

Copper and magnesium?


Give balanced equation for the following conversion affected by heat alone on the substance:

Zinc nitrate to nitrogen dioxide


Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.


Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].


Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Lead nitrate.


A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilised. Can the change in POP be reversed?


The changes in which new substance with new chemical properties are formed are ______.


A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

What changes do you expect?


A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

Are these changes chemical in nature?


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