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प्रश्न
Give one example each of which illustrates the following characteristics of a chemical reaction:
change of colour
उत्तर
When blue coloured copper sulphate reacts with hydrogen sulphide gas, a black coloured substance copper sulphide is formed.
\[\ce{\underset{\text{copper sulphate solution, blue}}{CuSO4} + \underset{\text{hydrogen sulphide}}{H2S} ->\underset{\text{copper sulphide black solid}}{CuS} +\underset{\text{sulphuric acid}}{H2SO4}}\]
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संबंधित प्रश्न
Gas A, which is the major cause of global warming, combines with hydrogen oxide B in nature in the presence of an environmental factor C and a green material D to form a six carbon organic compounds E and a gas F. The gas F is necessary for breathing.
(a) What is gas A?
(b) What is the common name of B?
(c) What do you think could be C?
(d) What is material D? Where is it found?
(e) Name the organic compound E.
(f) What is gas F? Name the natural process during which it is released.
Consider the following equation of the chemical reaction of a metal M:
4M + 3O2 → 2M2O3
This equation represents:
(a) combination reaction as well as reduction reaction
(b) decomposition reaction as well as oxidation reaction
(c) oxidation reaction as well as displacement reaction
(d) combination reaction as well as oxidation reaction
Explain the following type of chemical reaction, giving two examples for it:
Combination reaction
Explain the terms with examples.
Combination reaction
Select the correct answer for the statement given below:
The product formed during direct combination reaction of carbon dioxide and water.
Give a balanced equation for the following type of reaction:
A reaction of direct combination i.e. synthesis in which twp gases combine to give another gas – which turns lime water milky.
Explain the following reaction with their balanced chemical equation.
Ammonia gas reacts with hydrogen chloride.
The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy is a kind of:
Balance the following chemical equation and identify the type of chemical reaction.
`"Na"("s") + "S"("s") overset("(Fuse)")(->) "Na"_2"S"("s")`
Balance the following chemical equation and identify the type of chemical reaction.
`"CaO"("s") + "SiO"_2("s") -> "CaSio"_3("s")`
