Advertisements
Advertisements
प्रश्न
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
2H2 + O2 → 2H2O
उत्तर
Hydrogen with oxygen
2H2[ g] + O2[g] + 2H2O[l]
The gas (products) changes to liquid (reactants) state.
APPEARS IN
संबंधित प्रश्न
Translate the following statement into chemical equation and then balance the equation:
Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.
What is meant by chemical reaction? Explain with the help of an example.
Balance the following chemical equation :
Na20 + H20 → NaOH
Write the chemical equation for the following word equation and balance them.
Carbon + Oxygen → Carbon dioxide
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.
The chemical reactions in which heat is liberated are called endothermic reactions.
Write word equation for the following molecular equation:
\[\ce{CaCO3 + 2HCl ->[\triangle] CaCl2 + H2O + CO2 [g]}\]
Word equation:
State which characteristic does [g] in the above reaction indicate. The word equation of:
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – mercury [II] oxide.
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Lead nitrate to ammonium hydroxide.?
Write an Explanation.
Balanced equations
