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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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संबंधित प्रश्न
Complete and balance the following chemical equations
Na + H2 O →
Explain the type of reactions on the basis of the direction of reaction.
Write true or false .
A black residue is formed when sugar is heated .
Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
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)
Oxygen is a ______ in respiration.
Define the following term:
Precipitate
Give an example of a reaction where the following are involved:
Solution
Give an example of a reaction where the following are involved
Catalyst
Write the chemical reaction where the following changes are observed.
Precipitate is formed
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
Higher order Thinking question
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
________ is a chemical substance which alters the speed of a chemical reaction.
Chemical change is a temporary change.
______ change results in the change of the substance.
Which is used as a catalyst during the process of hydrogenation of oils?
Write the equation for the process of formation of rust.
Explain how the painting of an iron gate prevents it from rusting.
Both CO2 and H2 gases are ______.
