Advertisements
Advertisements
प्रश्न
Give one example of an endothermic reaction.
Advertisements
उत्तर
When nitrogen and oxygen are heated to a very high temperature (about 3000°C), they combine to form nitrogen monoxide, and a large amount of heat is absorbed in this reaction.
\[\ce{\underset{Nitrogen}{N2_{(g)}} + \underset{Oxygen}{O2_{(g)}} + Heat -> \underset{Nitrogen monoxide}{2NO_{(g)}}}\]
APPEARS IN
संबंधित प्रश्न
Give one example of a chemical reaction.
Write a complete balanced equation for the following reaction:
\[\ce{Sulphur dioxide (gas) + Oxygen (gas) -> Sulphur trioxide (gas)}\]
Balance the following equation:
\[\ce{Na + O2 -> Na2O}\]
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 non-metals.
With the help of an appropriate example, justify that some of the chemical reactions are determined by the evolution of a gas.
Give a chemical equation for the reaction involved in the above case.
Give one example of a chemical reaction characterised by the formation of a precipitate.
With the help of an appropriate example, justify that some of the chemical reactions are determined by a change in temperature.
Give a chemical equation for the reaction involved in the above case.
State one characteristic of the chemical reaction which takes place when dilute sulphuric acid is added to barium chloride solution.
An acid which can decolourise purple coloured potassium permanganate solution is ______.
Balance the following chemical equation :
FeS + HCl → FeCl2 + H2S
Balance the following chemical equation :
Na2CO3 + HCl → NaCI + H2O + CO2
Balance the equation stepwise.
NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)
Balance the following equation:
PbO + NH3 → Pb + H2O + N2
Balance the following equation:
NaHCO3 → Na2CO3 + H2O + CO2
Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.
Balance the following simple equation:
H2S + Cl2 → S + HCl
Balance the following simple equation:
Al + H2O → Al2O3 + H2
Balance the following simple equation:
Zn + HCl → ZnCl2 + H2
CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]
State the information not conveyed by the above chemical equation.
Write a balanced equation for the following word equation:
Lead dioxide [lead (IV) oxide] → Lead monoxide + Oxygen
