English

Give One Example of a Chemical Reaction. - Science

Advertisements
Advertisements

Question

Give one example of a chemical reaction.

Advertisements

Solution

Burning of magnesium ribbon in air to give white powder of magnesium oxide is an example of chemical reaction.

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Chemical Reactions and Equations - Exercise 1 [Page 19]

APPEARS IN

Lakhmir Singh Chemistry (Science) [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercise 1 | Q 17.1 | Page 19

RELATED QUESTIONS

Balance the following chemical equation.

\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]


When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.


Give one example of a chemical reaction characterised by  formation of a precipitate.


Is Decomposition of calcium carbonate an endothermic reaction or an exothermic reaction?


An acid which can decolourise purple coloured potassium permanganate solution is:
(a) sulphuric acid
(b) citric acid
(c) carbonic acid
(d) hydrochloric acid


When a mixture of gases X and Y is compressed to 300 atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide (heated to a temperature of 300°C), then an organic compounds Z having the molecular formula CH4O is formed. X is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; Y is a gas which can be made by the action of a dilute acid on an active metal; and Z is a liquid organic compound which can react with sodium metal to produce hydrogen gas.
(a) What are X, Y and Z?
(b) Write a balanced chemical equation of the reaction which takes place when X and Y combine to form Z. Indicate the conditions under which the reaction occurs.


A colourless lead salt, when heated, produces a yellow residue and brown fumes.
(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.


Balance the following chemical equation :

H2 + O2   →  H2O


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

 Carbon + Oxygen → Carbon dioxide.


Write your observation and name the product when zinc reacts with dilute hydrochloric acid.


Balance the following equation:

MnO2 + HCl → MnCl2 + H2O + Cl2


Write the balanced chemical equation of the following reaction.

potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.


When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.

Write the balanced chemical equation for this reaction.


Write word equation for the following molecular equation:

\[\ce{NH3 [g] + HCl [g] ⇌ NH4Cl [s]}\]

Word equation:
State which characteristic is observed in the above reaction.

Give an-example of a similar above characteristic, seen between two other gaseous reactants.


In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.

2H2 + O2 → 2H2O


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

Catalyst


Balance the following simple equation:

Al   +   N2  →  AlN 


Balance the following simple equation:

Mg  +  CO2  →  MgO  +  C


What is a reactant in a chemical equation?


Which of the following is the correct observation of the reaction shown in the above set up?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×