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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Complete and Balance the Following Chemical Equations: BaCi_2 + H_2so_4 → (Aq.) (Aq.) - Chemistry

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प्रश्न

Complete and balance the following chemical equations:

Ba`"CI"_2`   +  `"H"_2"SO"_4`   `→`

    (aq.)           (aq.)

एक पंक्ति में उत्तर

उत्तर

\[\ce{\underset{\text{(aq.)}}{BaCl2} + \underset{\text{(aq.)}}{H2SO4} ->BaSO4 ↓ + 2HCl}\]

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अध्याय 6: Chemical Reactions - Exercise 1 [पृष्ठ ७३]

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सेलिना Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 1 | Q 6.8 | पृष्ठ ७३

संबंधित प्रश्न

Write the missing reactants and products and balance the equations.

................+ HCI `→` NaCI + `"H"_2"O"` + .........................


 Fill in the blank

A change in which the substance can be brought back to its original state is called a _______ change.


Define chemical reaction.


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


State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .


Explain the following reaction with one suitable example of Decomposition reaction


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

CaCO3 → CaO + CO2


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

Fe2O3 + 2Al → Al2O3 + 2Fe


Reactants Products Type of chemical reaction
BaCl2(aq) + ZnSO4(aq) H2CO3(aq) Displacement
2AgCl(s) FeSO4(aq) + Cu(s) Combination
CuSO4(aq) + Fe(s) BaSO4↓ + ZnCl2(aq) Decomposition
H2O(l) + CO2(g) 2Ag(s) + Cl2(g) Double displacement

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. 


What is a chemical change? Give two examples of chemical change?


State the main characteristics of chemical reactions. Give at least one example in each case.


State the original colour of the following substance and colour of residue obtained after heating.

Copper carbonate


Complete the table given below.

Heat on iodine crystals Colour of vapours evolved  

Complete the table given below.

Addition of dil. H2SO4 to KHCO3  Name of residue obtained  

Complete the table given below.

Addition of dil. H2SO4 to zinc  Test for gas evolved  

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

State the following reaction represent oxidation or reduction.

\[\ce{Fe++->Fe+++}\]


State whether the following reaction is oxidation or reduction.

\[\ce{Na->Na+}\]


When lithium metal is placed in hydrochloric acid, _______ gas is evolved.


Silver articles turning black: ______:: Boiling of H2O: physical change ______.


Water boiling into water vapour is an example of chemical change.


Classify the following as physical or chemical properties

Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.


Which of the following is/are true when milk changes into curd?

  1. Its state is changed from liquid to semi-solid.
  2. It changes colour.
  3. It changes the taste.
  4. The change cannot be reversed.

Choose the correct option from below:


Melting of wax is a change where a solid changes to a liquid state. Give one more such change which you observe in your surroundings


Beating an egg to make a cake is a ______.


Heat may evolve or be absorbed during a ______ change.


______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.


The chemical formula of rust is ______.


Both CO2 and H2 gases are ______.


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