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प्रश्न
Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity
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उत्तर
Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions.
1)
2)
`2AgCl_((s))` + Sunlight 
`2Ag_(s) + Cl_(2(g))`
3)
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संबंधित प्रश्न
State the change in colour observed in the following case, mentioning the reason:
Silver chloride is exposed to sunlight.
A metal salt MX when exposed to light splits up to form metal M and a gas X2. Metal M is used in making ornaments whereas gas X2 is used in making bleaching powder. The salt MX is itself used in black and white photography.
- What do you think metal M is?
- What could be gas X2?
- Name the metal salt MX.
- Name any two salt solutions which on mixing together can produce a precipitate of salt MX.
- What type of chemical reaction takes place when salt MX is exposed to light? Write the equation of the reaction.
Explain the following type of chemical reaction, giving two examples for it:
Decomposition reaction
Identify the type of following reaction :
(a) Design an activity to demonstrate the decomposition reaction of lead nitrate.
(b) Draw labelled diagram of the experimental set-up. List two main observations.
(c) Write balanced chemical equation for the reaction stating the physical state of the reactant and the products.
How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?
Differentiate between direct combination reaction and a decomposition reaction.
Which among the following statement(s) is (are) true?
Exposure of silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride.
(ii) sublimation of silver chloride.
(iii) decomposition of chlorine gas from silver chloride.
(iv) oxidation of silver chloride.
When SO2 gas is passed through a saturated solution of H2S, which of the following reaction occurs?
A metal nitrate 'A' on heating gives a metal oxide along with evolution of a brown coloured gas 'B' and a colourless gas, which helps in burning. Aqueous solution of 'A' when reacted with potassium iodide forms a yellow precipitate.
- Identify 'A' and 'B'
- Name the types of the reactions involved in the above statement.
