Advertisements
Advertisements
प्रश्न
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the volume of chlorine gas formed at S.T.P.
Advertisements
उत्तर
1 mole of chlorine gas has volume = 22.4 dm3
So, 0.02 mole will have volume = 22.4 × 0.02
= 0.448 dm3
संबंधित प्रश्न
Balance the following equation:
Na + O2 
Na2O
What do you understand by endothermic reactions?
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of:
(a) potassium chloride
(b) potassium nitride
(c) potassium sulphide
(d) potassium iodide
Write word equation for the following molecular equation:
\[\ce{CuSO4 + 2NaOH -> Na2SO4 + Cu(OH)2↓}\]
Word equation:
State the colour of the products.
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.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
Balance the following simple equation:
CO2 + C → CO
Balance the following simple equation:
Al + H2O → Al2O3 + H2
Balance the following simple equation:
NaHCO3 + H2SO4 → Na2SO4 + H2O + CO2
Fill in the blank with the correct word from the options given below:
A chemical equation is a shorthand form for a _______ change.
