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प्रश्न
Limestone contains ______ mainly.
विकल्प
calcium chloride
Calcium carbonate
calcium nitrate
calcium sulphate
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उत्तर
Limestone contains Calcium carbonate mainly.
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संबंधित प्रश्न
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
Copper carbonate when heated, it turns :
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Give examples of exothermic reactions i.e. heat evolved in each of the following:
(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.
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.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
A reaction between an acid and a base is called ______.
