English

Write one equation each for decomposition reactions where energy is supplied in the form of heat. - Science

Advertisements
Advertisements

Question

Write one equation for decomposition reactions where energy is supplied in the form of heat.

Short Note

Solution

Decomposition reaction involving absorption of heat,

  1. \[\ce{\underset{Zinc carbonate}{ZnCO3_{(s)}} ->[\Delta]\underset{Zinc oxide}{ZnO_{(s)}} + \underset{Carbon dioxide}{CO2_{(g)}}}\]
  2. \[\ce{CaCO3->[heat]CaO_{(s)} + CO2_{(g)}}\]
  3. \[\ce{2FeSO4(s) ->[heat] Fe2O3(s) + SO2(g) + SO3(g)}\]
shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Chemical Reactions and Equations - Exercise 2 [Page 45]

APPEARS IN

Lakhmir Singh Chemistry (Science) [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercise 2 | Q 13 | Page 45
NCERT Science [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercises | Q 12 | Page 16

RELATED QUESTIONS

Write the balanced chemical equation for the following and identify the type of reaction.

\[\ce{Zinc carbonate(s) -> Zinc oxide(s) + Carbon dioxide(g)}\]


What does one mean by exothermic reaction? Give example.


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.


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?

CaCO3  →  CaO  +  CO2

 


What type of reaction is represented by the following equation?

2 FeSO4 → FeO3 + SO2 + SO3


What type of chemical reaction take place when lime-stone is heated?


How will you obtain  Nitrogen dioxide from lead nitrate.
Also give balanced equations for the reactions


MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Thermal decomposition of a substance is brought about with the help of

  1. reactants
  2. water
  3. wind
  4. heat

Study the following figure and answer questions. 

a) After heating Calcium carbonate, which gas is formed in a test tube?
b) When we pass this gas through limewater what change, did you observe?
c) Write down the chemical reaction showing the product formation after heating the Calcium carbonate.

 


A student wants to study a decomposition reaction by taking ferrous sulphate crystals. Write two precautions he must observe while performing the experiment. 


How can the rate of the chemical reaction, namely, decomposition of hydrogen peroxide be increased?


Classify the following reaction into – 

  1. Direct combination 
  2. Decomposition
  3. Displacement
  4. Double decomposition

The reaction is – Zinc hydroxide on heating gives zinc oxide and water.


Complete the statement by filling in the blank with the correct word:

Decomposition of silver salts in the presence of sunlight is an example of _________.


Explain the reaction given in the figure.


Photolysis is a decomposition reaction caused by ______


Assertion: Decomposition of vegetable matter into compost is an endothermic reaction.

Reason: Decomposition reaction involves breakdown of a single reactant into simpler products.


Balance the following chemical equation and identify the type of chemical reaction.

`"H"_2"O"_2("l") overset("U  V")(->) "H"_2"O"("l") + "O"_2("g")`


Write the molecular formula of calcium carbonate.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×