English

Give one example of an exothermic reaction.

Advertisements
Advertisements

Question

Give one example of an exothermic reaction.

Very Short Answer
Advertisements

Solution

When carbon burns in oxygen to form carbon dioxide, a large amount of heat is released.

\[\ce{\underset{Carbon}{C_{(s)}} + \underset{Oxygen}{O2_{(g)}} -> \underset{Carbon dioxide}{CO2_{(g)}} + Heat}\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Chemical Reactions and Equations - Exercise 1 [Page 31]

APPEARS IN

Lakhmir Singh Chemistry Part 2 [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercise 1 | Q 35. (b) (i) | Page 31

RELATED QUESTIONS

Balance the following chemical equation.

\[\ce{BaCl2 + H2SO4 -> BaSO4 + HCl}\]


Translate the following statement into a chemical equation and then balance it.

Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.


Translate the following statement into a chemical equation and then balance the equation:

Aluminium metal replaces iron from ferric oxide, Fe2O3, giving aluminium oxide and iron.


Substitute formulae for names and balance the following equation:

Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.


Give one example of a chemical reaction characterised by a change in state.


What is a chemical equation?


Write symbolic representation for the following word equation and balance them :

Calcium carbonate → Calcium oxide + Carbon dioxide.


Balance the equation stepwise.
H2S2O7(l) + H2O(l) → H2SO4(l)


Write the balanced chemical equation of the following reaction.

copper + nitric acid → copper nitrate + nitric oxide + water


Write the balanced chemical equation of the following reaction.

barium chloride + sulphuric acid → barium sulphate + hydrochloric acid


Match column A with column B. 

Column A Column B
(a) Blue salt changes to white and then black (i) Ammonium dichromate
(b) Orange coloured compound changes to green. (ii) Iodine
(c) Red compound changes to brown and then yellow. (iii) Zinc Nitrate
(d) White to yellow when hot and white when cold. (iv) Copper sulphate
(e) Violet solid changes to violet vapours. (v) Red Lead

What is thermit process?


Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.

Heat energy


\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]

State why the compound MnO2 is written above the arrow.


Balance the following simple equation:

Fe2O3  +  CO  →  Fe  +  CO2 


Write a balanced equation for the following word equation:

Potassium bicarbonate → Potassium carbonate + Water + Carbon dioxide 


Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Fe2O3 + 2H2 → 2Fe + 3H2O


Complete the given chemical reaction.

\[\ce{CuSO_{4(aq)} + Fe_{(s)} ->}\]______ + ______


Reema took 5ml of Lead Nitrate solution in a beaker and added approximately 4ml of Potassium Iodide solution to it. What would she observe?


Which of the following statements about the given reaction are correct?

`3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`

  1.  Iron metal is getting oxidised
  2. Water is getting reduced
  3. Water is acting as reducing agent
  4.  Water is acting as oxidising agent

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×