Advertisements
Advertisements
प्रश्न
Show the formation of Na2O by the transfer of electrons.
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
Complete and balance the following equation:
NaOH + ............ 
Na2 SO4 + H2O
Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.
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.
Express the following facts in the form of a balanced chemical equation:
"When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed".
Write the answer to the following.
Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water.
Write the chemical equation for the following word equation and balance them.
Sodium reacts with water to form sodium hydroxide and hydrogen
Name the substances that are getting oxidised and reduced in the process.
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.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Balance the following simple equation:
Al + N2 → AlN
