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प्रश्न
Give an example of a reaction where the following are involved
Heat
उत्तर
\[\ce{CuCO3_(_s_) ->[\Delta] CuO + CO2_(_g_)}\]
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संबंधित प्रश्न
Define; catalyst.
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
What are chemical reactions?
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Define the following terms
Precipitate
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Write your observation and a balanced equation in the case of the following substances being heated.
Copper carbonate.
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
Give balanced equation for the following conversion affected by heat alone on the substance:
Ammonium dichromate to nitrogen
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Chemists identify gypsum as a natural indicator.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Write word equations for two chemical reactions with the help of materials given in the box.
Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
When magnesium is burnt in the air, a new substance is formed which is ______.
Iron and rust are the same substances.
Write a note on the following:
Curdling of milk
Acid rain is a result of ______.
