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Select the Correct Answer for the Statement Given Below: the Neutral Gas Obtained on Thermal Decomposition of Potassium Nitrate.

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Question

Select the correct answer for the statement given below:

The displaced product of the displacement reaction of sodium with cold water.

Options

  • Iron

  • Carbonic acid

  • Hydrogen

  • Oxygen

  • Carbon monoxide

MCQ
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Solution

Hydrogen

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Chapter 6: Chemical Reactions - Objective type questions

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Viraf J. Dalal New Simplified Middle School Chemistry [English] Class 8
Chapter 6 Chemical Reactions
Objective type questions | Q 1.3

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Reaction of iron nails with copper sulphate solution is an example of
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(b) Decomposition reaction
(c) Displacement reaction
(d) Double displacement reaction


What type of reaction is represented by the following equation?

\[\ce{Mg + CuSO4 -> MgSO4 + Cu}\]


What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.


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When a strip of red-brown metal X is placed in a colourless salt solution YNO3 then metal Y is set free and a blue coloured salt solution X(NO3)2 is formed. The liberated metal Y forms a shining white deposit on the strip of metal Х.

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  3. What could be metal Y?
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i) Observe the following reaction and answer the following questions.
`CuSO_4 (aq) + Fe (s) →  FeSO_4(aq) + Cu (s)`
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b) Write the definition of above reaction.


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The reaction is – Zinc reacts with copper [II] sulphate to give zinc sulphate and copper.


Give a balanced equation for –

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A single displacement reaction is represented by X(s) + 2HCl(aq) → XCl2(aq) + H2(g). Which of the following(s) could be X.

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(ii) Ag

(iii) Cu

(iv) Mg.

Choose the best pair. 


The colour of the solution observed after 30 minutes of placing zinc metal in copper sulphate solution is ______.


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