मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

What is electrolysis? - Science and Technology 1

Advertisements
Advertisements

प्रश्न

What is electrolysis?

व्याख्या
एका वाक्यात उत्तर

उत्तर

If the decomposition of a substance takes place by means of electrical energy, it is called electrolysis.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Chemical reactions and equations - Answer the Following

APPEARS IN

संबंधित प्रश्‍न

What does one mean by exothermic reaction? Give example.


Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.


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


Taking into consideration the relationship in the first pair, complete the second pair

2H2 + O2 → 2H2O :Combination Reaction :: 2HgO → 2Hg + O2:_________


What type of reaction is represented by the digestion of food in our body?


State an important use of decomposition reactions.


Give one example of a decomposition reaction which is carried out with electricity.


What type of reaction is represented by the following equation?

2 FeSO4 → FeO3 + SO2 + SO3


What type of chemical reaction is represented by the following equation?

X → Y + Z

 


What type of reaction is represented by the following equation?

NH4NO2 → N2 + 2H2O


What is the colour of ferrous sulphate crystals? How does this colour change after heating?


Name the product formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change?


What is a decomposition reaction?


Which of the following can be decomposed by the action of light?
(a) NaCl
(b) KCl
(c) AgCl
(d) CuCl


When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out.
(a) Name the iron salt.
(b) Name the type of reaction that takes place during the heating of iron salt.
(c) Write a chemical equation for the reaction involved.


Two metals X and Y form the salts XSO4 and Y2SO4, respectively. The solution of salt XSO4 is blue in colour whereas that of Y2SO4 is colourless. When barium chloride solution is added to XSO4 solution, then a white precipitate Z is formed alongwith a salt which turns the solution green. And when barium chloride solution is added to Y2SO4 solution, then the same white precipitate  Z is formed alongwith colourless common salt solution.
(a) What could the metals X and Y be?
(b) Write the name and formula of salt XSO4.
(c) Write the name and formula of salt Y2SO4.
(d) What is the name and formula of white precipitate Z?
(e) Write the name and formula of the salt which turns the solution green in the first case.


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?


Differentiate between direct combination reaction and a decomposition reaction.


Give a balanced equation for –

A thermal decomposition reaction involving heat on limestone [calcium carbonate]


Give a balanced equation for –

An electrolytic decomposition reaction involving a neutral liquid


Differentiate between the following:

Thermal decomposition and thermal dissociation.


Explain the reaction given in the figure.


Electrolysis is type of ______ reaction.


Marble statues are corroded or stained rain water. Identify the main reason.


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")`


On heating blue coloured powder of copper (II) nitrate, in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed

  1. Write a balanced chemical equation of the reaction.
  2. Identify the brown gas X evolved.
  3.  Identify the type of reaction.
  4. What could be the pH range of aqueous solution of the gas X?

The reaction of calcium carbonate, with freshly prepared lime water, is shown below:

Answer the questions with the help of a diagram:

  1. What type of reaction does calcium carbonate undergoes?
  2. What change in colour is observed in lime?
  3. Write the chemical equation.


These consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion: Silver bromide decomposition is used in black and white photography.

Reason: Light provides energy for this exothermic reaction.


  1. Identify the gasses evolved at the anode and cathode in the above experimental set up.
  2. Name the process that occurs. Why is it called so?
  3. Illustrate the reaction of the process with the help of a chemical equation.

Complete the following reaction:

\[\ce{C_12H_22O11->[Heat]}\] ______ + ______.


A metal nitrate 'A' on heating gives a metal oxide along with evolution of a brown coloured gas 'B' and a colourless gas, which helps in burning. Aqueous solution of 'A' when reacted with potassium iodide forms a yellow precipitate.

  1. Identify 'A' and 'B'
  2. Name the types of the reactions involved in the above statement.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×