Advertisements
Advertisements
प्रश्न
Differentiate between the following:
Electrolytic decomposition and photochemical decomposition.
Advertisements
उत्तर
- Electrolytic decomposition: “A decomposition reaction which is brought about by the passage of electric current.”
\[\ce{2H2O->[Electricity][Current]2H2 + O2}\] - Photochemical decomposition: “A decomposition reaction which takes place in presence of light.”
e.g. decomposition of silver salts in the presence of sunlight.
APPEARS IN
संबंधित प्रश्न
A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.
(a) What is substance P? Write its common name as well as chemical formula.
(b) What is substance Q?
(c) What is gas R?
(d) What is substance S? What is its clear solution known as?
(e) What is substance T? Name any two natural forms in which substance T occurs in nature.
Give one example of a decomposition reaction which is carried out by applying heat.
What type of chemical reaction is used to extract metals from their naturally occurring compounds like oxides or chlorides?
What type of reaction is represented by the following equation?
NH4 CI → NH3 + HCI
What type of chemical reaction is represented by the following equation?
X → Y + Z
State the change in colour observed in following case mentioning the reason:
Silver chloride is exposed to sunlight.
How will you obtain Nitrogen dioxide from lead nitrate.
Also give balanced equations for the reactions
A student wants to study a decomposition reaction by taking ferrous sulphate crystals. Write two precautions he must observe while performing the experiment.
Give a balanced equation for –
An electrolytic decomposition reaction involving a neutral liquid
Give the ratio in which hydrogen and oxygen are present in water by volume.
