Advertisements
Advertisements
प्रश्न
With the help of an appropriate example, justify that some of the chemical reactions are determined by Change in temperature.
Give chemical equation for the reaction involved in the above case.
Give one example of a chemical reaction characterised by change in temperature.
Advertisements
उत्तर
When quicklime reacts with water, slaked lime is formed with a release of large amount of heat, causing change in temperature in the reaction mixture.
\[\ce{CaO + H2O->Ca(OH)2 + Heat}\]
APPEARS IN
संबंधित प्रश्न
Translate the following statement into chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are elements.
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
A white precipitate can be obtained by adding dilute sulphuric acid to:
(a) CuSO4 solution
(b) Nacl solution
(c) BaCl2 solution
(d) Na2SO4 solution
Balance the following equation :
Pb3O4 → PbO + O2
Balance the following equation. Also name the product formed.
FeCI2 + CI2 → FeCI3
Balance the following equation:
HNO3 + H2S → NO2 + H2O + S
Balance the following equation:
Zn + HNO3 `→` Zn(NO3)2 + H2O + NO2
What information does the following chemical equation convey?
Zn + H2SO4 → ZnSO4+ H2
What is the valency of :
carbon in CH4
Write the balanced chemical equation of the following reaction.
potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
Write the balanced chemical equation of the following reaction.
aluminium sulphate + sodium hydroxide → sodium sulphate + sodium meta aluminate + water.
Answer the following question:
How do acids and bases react with each other? What is the name of the process? What product is obtained from these reactions?
Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Zinc reacts with silver nitrate to produce zinc nitrate and silver.
A student mixes sodium sulphate powder in barium chloride powder. What change would the student observe on mixing the two powders? Justify your answer and explain how he can obtain the desired change.
Write scientific reason.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
Which of the following is the correct observation of the reaction shown in the above set up?
When aqueous solutions of potassium iodide and lead nitrate are mixed an insoluble substance separates out. The chemical equation for the reaction involved is:
