Advertisements
Advertisements
प्रश्न
Show the formation of Na2O by the transfer of electrons.
Advertisements
उत्तर
`Na_2O`
Na=11=2,8,1 (Valency = 1)
O = 8 = 2,6 (Valency = 2)
(a) `Na → Na^(+)+ e^-`
`(Na → Na^(+)+e^-) xx 2`
`2Na → 2Na + 2e^-`
(b) `O + e^(-)→ O^-`
`(O + e^(-) → O^- ) xx 2`
`2O + 2e^(-) → O^-`

`i.e. 2Na + O → Na_2O`
APPEARS IN
संबंधित प्रश्न
Explain, with an example, how the physical states of the reactants and products can be shown in a chemical equation.
Write the balanced equation for the following reaction, and add the state symbol:
Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water.
Write word equation for the following skeletal equation:
\[\ce{CO + O2 -> CO2}\]
Write the balanced chemical equation of the following reaction. potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
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:
Write word equation for the following molecular equation:
\[\ce{N2 + 3H2 ⇌[Fe - 450°C][200 atoms] 2NH3 + \triangle}\]
Word equation:
State why [+ Δ] indication is seen after NH3.
State what 200 atmospheres – indicates.
State the function of Fe in the above reaction.
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 – zinc carbonate.
Balance the following simple equation:
CO2 + C → CO
Balance the following simple equation:
Ca + H2O → Ca(OH)2 + H2
A dilute ferrous sulphate solution is gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
