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प्रश्न
State two characteristics of the chemical reaction which takes place when dilute sulphuric acid is poured over zinc granules.
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उत्तर
When dilute sulphuric acid is poured over zinc granules, hydrogen gas is evolved, and the mixture becomes hot. Hence, the evolution of a gas and a change in temperature are two characteristics of this chemical reaction.
\[\ce{Zn_{(s)} + H2SO4_{(aq)} -> ZnSO4_{(aq)} + H2_{(g)} + Heat}\]
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संबंधित प्रश्न
Reaction of iron nails with copper sulphate solution is an example of
(a) Combination reaction
(b) Decomposition reaction
(c) Displacement reaction
(d) Double displacement reaction
CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s) is an example of a decomposition reaction.
\[\ce{Fe2O3 + 2Al -> Al2O3 + 2Fe}\]
The above reaction is an example of a ______.
What happens when dilute hydrochloric acid is added to iron fillings? Choose the correct answer.
In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the reaction involved.
what type of reaction is the following:
Cl2 + 2KI → 2KCl + I2
What type of reaction is represented by the following equation?
2Na + 2H2O → 2NaOH + H2
What type of reaction is represented by the following equation?
Mg + CuSO4 → MgSO4 + Cu
What happens when a piece of iron metal is placed in copper sulphate solution? Name the type of reaction involved.
A strip of metal X is dipped in a blue coloured salt solution YSO4. After some time, a layer of metal Y from the salt solution is formed on the surface of metal strip X. Metal X is used in galvanisation whereas metal Y is used in making electric wires. Metal X and metal Y together form an alloy Z.
(a) What could metal X be?
(b) What could metal Y be?
(c) Name the metal salt YSO4.
(d) What type of chemical reaction takes place when metal X reacts with salt solution YSO4? Write the equation of the chemical reaction involved.
(e) Name the alloy Z.
The colour of an aqueous solution of zinc sulphate as observed in the laboratory is:
(1) Green
(2) Yellow
(3) Blue
(4) Colourless
Classify the following reaction into different type:
Zn + CuSO4 → ZnSO4 + Cu
Classify the following reaction into –
- Direct combination
- Decomposition
- Displacement
- Double decomposition
The reaction is – Zinc reacts with copper [II] sulphate to give zinc sulphate and copper.
Give a balanced equation for –
A displacement reaction involving a metal above hydrogen in the activity series with copper [II] sulphate solution
\[\ce{Pb + CuCl2 -> PbCl2 + Cu}\]
The above reaction is an example of:
Complete the following chemical reaction:
\[\ce{CuSO4 (aq) + Pb (s) -> \underline{}\underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the chemical reaction type.
Complete the given chemical equation:
\[\ce{Zn(s) + CuSO4(aq) -> \underline{}\underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{}\underline{}}\]
Name the type of reaction.
The colour of the solution observed after 30 minutes of placing zinc metal in copper sulphate solution is ______.
