English

What Do You Understand by Endothermic Reactions? - Science

Advertisements
Advertisements

Question

What do you understand by endothermic reactions?

Advertisements

Solution

Endothermic reaction is the chemical reaction that consumes heat to form products.
Example:

 

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Chemical Reactions and Equations - Exercise 1 [Page 21]

APPEARS IN

Lakhmir Singh Chemistry (Science) [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercise 1 | Q 35.2 | Page 21

RELATED QUESTIONS

Write the balanced chemical equation for the following reaction.

\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]


What is wrong with the following chemical equation?

Mg   +   O   →   MgO

Correct and balance it.


How will you indicate a solution made in water in a chemical equation?


Substitute formulae for names and balance the following equation:
Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.


With the help of an appropriate example, justify that some of the chemical reactions are determined by Change in colour 

Give chemical equation for the reaction involved in the above case. 


You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of:
(a) potassium chloride
(b) potassium nitride
(c) potassium sulphide
(d) potassium iodide


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


Write the balanced equation for the following chemical reaction.

\[\ce{Barium chloride + Aluminium sulphate -> Barium sulphate + Aluminium chloride}\]


Write your observation for the following chemical reaction and name the product formed:

When sugar is heated.


State the information conveyed by the following equation:

Zn(s) + 2HCl(aq) → ZnCl2(aq)  + H2 ↑


Write the chemical equation for the following word equation and balance them.

Calcium oxide + Carbon dioxide → Calcium carbonate


Write the chemical equation for the following word equation and balance them.

Magnesium + Sulphuric acid → Magnesium sulphate + Hydrogen


Balance the following equation:

 Fe + H2O → Fe3O4 + H2

 


Write the balanced chemical equation of the following reaction.

iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide


Complete the following blank in the equation as indicated.

\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]

Moles: 1 mole + ______ `→` ______ + ______


Write word equation for the following molecular equation:

CuCo3 → CuO + CO2 [g]

Word equation:

State the characteristics or indications occurring in the above reaction.


In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:

Copper [II] sulphate to sodium hydroxide.


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

Electrical energy


Balance the following simple equation:

H2   +   Cl2  →  HCl


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×