English
Maharashtra State BoardSSC (English Medium) 10th Standard

What is electrolysis? - Science and Technology 1

Advertisements
Advertisements

Question

What is electrolysis?

Very Short Answer
Advertisements

Solution

The cell which converts electrical energy into chemical energy is called an electrolytic cell, and the process which converts electrical energy into chemical energy is called electrolysis.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Chemical reactions and equations - Answer the Following

APPEARS IN

SCERT Maharashtra Science and Technology 1 [English] 10 Standard SSC
Chapter 3 Chemical reactions and equations
Answer the Following | Q 4.2

RELATED QUESTIONS

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:_________


State an important use of decomposition reactions.


What type of reaction is represented by the following equation?

\[\ce{CaCO3 -> CaCO + CO2}\]


What type of reaction is represented by the following equation?

2 FeSO4 → FeO3 + SO2 + SO3


What type of reaction is represented by the following equation?

NH4 CI → NH3  +  HCI


What type of chemical reaction take place when lime-stone is heated?


What type of chemical reaction take place when electricity is passed through water?


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?


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.


Explain the following type of chemical reaction, giving two examples for it:

Decomposition reaction


How will you obtain  Nitrogen dioxide from lead nitrate.
Also give balanced equations for the reactions


What do you mean by redox reaction ? Explain with the help of an example.


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.

 


Rewrite the following statement by selecting the correct option:
________________ is a decomposition reaction.

Classify the following reaction into different type:

\[\ce{2KClO3(s)->[\Delta] 2KCl(aq) + 3O2(g)}\]


Give a balanced equation for –

An electrolytic decomposition reaction involving a neutral liquid


Give a balanced equation for –

A white precipitate obtained during a double decomposition reaction involving a silver salt with sodium salt.


Complete the statement by filling in the blank with the correct word:

Decomposition of silver salts in the presence of sunlight is an example of _________.


Differentiate between the following:

Thermal decomposition and thermal dissociation.


Differentiate between the following:

Electrolytic decomposition and photochemical decomposition.


Explain the reaction given in the figure.


Which of the following is an endothermic process?


When SO2 gas is passed through a saturated solution of H2S, which of the following reaction occurs?


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.

When lead nitrate is heated strongly in a boiling tube, two gases are liberated and a solid residue is left behind in the test tube.

  1. Name the type of chemical reaction and define it.
  2. Write the name and formula of the coloured gas liberated.
  3. Write the balanced chemical equation for the reaction.
  4. Name the residue left in the test tube and state the method of testing its nature (acidic/basic).

Write the molecular formula of calcium carbonate.


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×