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You are here: Home / Class 10 / Chemical Reaction and equation / Characteristics of Chemical reaction

Characteristics of Chemical reaction

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 8 Comments

Question 1 State the characteristics of chemical reaction?

Question 2 Give an example of chemical reaction characterised by evolution of gas?

Question 3 Give an example of chemical reaction characterised by formation of precipitate?

Question 4 Give an example of chemical reaction characterised by change in colour?

Question 5 Give an example of chemical reaction characterised by change in temperature?

Question 6 Give an example of chemical reaction characterised by change in state?

Question 7 What happen when dilute HCl reacts with sodium carbonate?

Characteristics of Chemical reaction

1)Evolution of gas
Some chemical reactions are characterised by the evolution of gas.
For Ex:1)Reaction between zinc and dilute sulphuric acid to form hydrogen gas.
2)Reaction between sodium carbonate and dilute hydrochloric acid to form carbon dioxide gas.

2)Formation of precipitate
Some chemical reactions are characterised by the formation of precipitate.
For Ex:1)Reaction between Potassium iodide and lead nitrate to form yellow precipitate of lead iodide.
2)Reaction between sulphuric acid and barium chloride to form white precipitate of barium sulphate.

3)Change in colour
Some chemical reactions are characterised by change in colour
For Ex:1)When citric acid reacts with potassium permanganate (purple) then purple colour disappears
2)When sulphur dioxide gas reacts with acidified potassium dichromate,change in colour from orange to yellow is observed.

4)Change in temperature
Those reactions in which heat is produced or evolved are called exothermic reactions.
For Ex:Reaction between zinc granules with dilute sulphuric acid.
Those reactions in which heat is absorbed are called as endothermic reactions.

Reaction between barium hydroxide and ammonium chloride to form barium chloride,ammonia and water.

5)Change of state
Some chemical reactions are characterised by change in state.
For Ex:when wax(solid) is burned ,then water(liquid) and carbon dioxide(gas) are formed.

 

Other topics from Chapter 1 Chemical Reaction and Equation

  • Chemical equation
  • Chemical Reaction and Equation
  • Combination reaction
  • Decomposition reaction
  • Displacement Reaction
  • Double Displacement Reaction
  • Oxidation and Reduction reaction
  • Effects of oxidation Reaction in Everyday Life

Filed Under: Chemical Reaction and equation, Class 10 Tagged With: change in colour, change in temperature, change of state, endothermic reaction, evolution of gas, exothermic reaction, formation of precipitate

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Comments

  1. Darga Balraj goud says

    August 8, 2018 at 7:16 pm

    Excellent thanks for these answers

    Reply
    • The Beast says

      November 15, 2020 at 11:11 am

      Thank U
      it reaLLy HeLped Me

      Reply
  2. Khushi Dambhare says

    April 23, 2019 at 1:35 pm

    Thank you very much it really helped for studying characteristics of chemical reaction
    Thank you

    Reply
  3. Leuvan dharan says

    January 6, 2020 at 8:00 pm

    Thanks for your excellent notes.

    Reply
  4. Yash sharma says

    April 3, 2020 at 3:36 pm

    Wonderfully explained…
    Very helpful source

    Reply
  5. roopali Roopdarshinee says

    May 24, 2020 at 2:00 pm

    Thanks for such a great help.

    Reply
  6. Siddharth Pandey says

    June 13, 2020 at 8:55 am

    Excellent answerrss

    Reply
  7. shivi gautam says

    October 27, 2020 at 8:28 am

    really perfect answer what i need i got it here very helpful . thanks for the answer

    Reply

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