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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 8

Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation. ZnA(s)+HA2SOA4⟶ZnSOA4A(s)+HA2A(g)

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प्रश्न

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

\[\ce{Zn_{(s)} + H2SO4 -> ZnSO4_{(s)} + H2_{(g)}}\]

विकल्प

  • Combination

  • Decomposition

  • Displacement

  • Precipitation

  • Neutralization

MCQ
रासायनिक समीकरण/संरचनाएँ
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उत्तर

The given reaction is a displacement reaction.

\[\ce{Zn_{(s)} + H2SO4 -> ZnSO4_{(s)} + H2_{(g)}}\]

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अध्याय 6: Chemical Reactions - Exercise 2 [पृष्ठ ८५]

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एस पी सिंग Concise Chemistry [English] Class 8 ICSE
अध्याय 6 Chemical Reactions
Exercise 2 | Q 2. (b) | पृष्ठ ८५

संबंधित प्रश्न

Write the balanced chemical equation for the following and identify the type of reaction.

\[\ce{Zinc carbonate(s) -> Zinc oxide(s) + Carbon dioxide(g)}\]


A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.

  1. What is substance P? Write its common name as well as chemical formula.
  2. What is substance Q?
  3. What is gas R?
  4. What is substance S? What is its clear solution known as?
  5. What is substance T? Name any two natural forms in which substance T occurs in nature.

The white solid compound A decomposes quite rapidly on heating in the presence of a black substance X to form a solid compound B and a gas C. When an aqueous solution of compound B is reacted with silver nitrate solution, then a white precipitate of silver chloride is obtained along with potassium nitrate solution. Gas C does not burn itself but helps burn other things.

  1. What is compound A?
  2. What is compound B?
  3. What is gas C?
  4. What do you think is the black substance X? What is its function?
  5. What is the general name of substances like X?

What is a redox reaction? Explain with an example.


Classify the following reaction into different type:

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


Classify the following reaction into – 

  1. Direct combination 
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  3. Displacement
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The reaction is – Zinc hydroxide on heating gives zinc oxide and water.


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

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  1. Name the type of chemical reaction and define it.
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  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 one equation for the decomposition reaction where energy is supplied in the form of light.


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