मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 8

Match the chemical reactions in List I with the appropriate answer in List II. List I List II 1. XY⇌heatX+Y A: Displacement reaction 2. XY⟶X+Y B: Double decomposition 3. XA+YA−+AA+BA−⟶XA+BA−+AA+YA− C

Advertisements
Advertisements

प्रश्न

Match the chemical reactions in List I with the appropriate answer in List II.

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] A: Displacement reaction
2. \[\ce{XY->X + Y}\] B: Double decomposition
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] C: Endothermic reaction
4. \[\ce{X + YZ->XZ + Y}\] D: Thermal dissociation
5. \[\ce{X + Y->[heat]XY -\Delta}\] E: Decomposition reaction
जोड्या लावा/जोड्या जुळवा
Advertisements

उत्तर

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] D: Thermal dissociation
2. \[\ce{XY->X + Y}\] E: Decomposition reaction
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] B: Double decomposition
4. \[\ce{X + YZ->XZ + Y}\] A: Displacement reaction
5. \[\ce{X + Y->[heat]XY - \Delta}\] C: Endothermic reaction
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 6: Chemical Reactions - Objective type questions

APPEARS IN

संबंधित प्रश्‍न

Fill in the blanK

 A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.


Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]


                                    MATCH THE COLUMNS

1 . `H_2` + `CI_2` `→` 2HCI    a. displacement reaction
2. `2FeCI_3`+ `H_2`  `→` `2FeCI_2` +2HCI` b. addition of an electronegative redical 
3. Fe + `CuSO_4` `→``FeSO_4` +Cu`  c. removal of an electronegative redical 
4. `2H_2O` +`4NO_2`+`O_2` `→` `4HNO_3` d.reduction by adding hydrogen
5. 3Fe +`3CI_2` `→` `2FeCI_3` e.electrolysis of water
6. `FeCI_3`+ 3NaOH `→``Fe(OH)_3``↓`+NaCI F.double decomposition,precipitation reaction
7.`2H_2O` `→` `2H_2``↑`+`O_2` e. combination or synthesis reaction

 


Is kerosene an electrolyte or a non-electrolyte ?


State what you would observe when the following substance is heated in a glass test tube red lead.


Name the type of chemical reaction shown by the following equation :

Fe2O3 + 2Al → Al2O3 + 2Fe


Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition) 

The conversion of ferrous sulphate to ferric sulphate is ______ reaction. 


Give an example of a reaction where the following are involved

Pressure


Name: Gas with rotten egg smell. 


Select the correct answer for the following options:

The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.


Give reason for the following:

Electrolytic decomposition of water is a reaction involving change of state.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves on strong heating a black residue and evolves two colourless gases one of which is acidic and the other neutral.


Complete the table given below.

Heat on  Zinc nitrate Colour of residue  

Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.


Give a balanced equation for the conversion of a soluble lead salt to an insoluble lead salt – formed as a white precipitate.


Chemical change is a temporary change.


Classify the following processes into physical or chemical changes:

  1. Beating of aluminium metal to make aluminium foil.
  2. Digestion of food.
  3. Cutting of a log of wood into pieces.
  4. Burning of crackers.

The chemical formula of rust is ______.


Write the characteristics of chemical change.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×