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प्रश्न
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
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उत्तर
Heat Energy:
On heating the reactants – the reacting particles, collide swiftly and with greater intensity.
Example:
Heat on zinc carbonate:
\[\ce{ZnCO3 ->[\triangle] ZmO + CO2 [g]}\]
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संबंधित प्रश्न
Give one example of an exothermic reaction.
The chemical reaction between quicklime and water is characterised by:
(a) evolution of hydrogen gas
(b) formation of slaked lime precipitate
(c) change in temperature of mixture
(d) change in colour of the product
One of the following is an exothermic reaction. This is:
(a) electrolysis of water
(b) conversion of limestone into quicklime
(c) process of respiration
(d) process of photosynthesis
Balance the following equation :
Pb3O4 → PbO + O2
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
Explain the terms with examples.
Balanced equation
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.
Name the following:
Two gases which react under pressure in presence of a catalyst at elevated temperatures to give a gaseous product.
Write a balanced equation for the following word equation:
Aluminium + Oxygen → Aluminium oxide
What are products? Explain with the help of example.
