UNN POST-UTME CHEMISTRY 2021/2022 ,Sure guide.

[@emmanueldonfil5628]

Great guide. Thank you Sir

[@jiugo]

1. Why is sodium carbonate the only one to hydrolyse?

[@SirMajestyEASYWORLD]

The super genius,you have gone there already,, Salts of strong acid and strong base don't hydrolyse in water... Among the options it is only Sodium carbonate that is not a salt of strong acid and strong base. It is a salt of weak acid(H2CO3) and a strong base(NaOH). Therefore it hydrolyzes in water to form a basic solution. That's why it is usually used in titration against acids, because in aqueous solution it acts as a base. But remember sodium carbonate is a salt.. Sodium sulphate is a salt of strong acid(H2SO4) and a strong base(NaOH). It will remain neutral in aqueous solution

[@jiugo]

@@SirMajestyEASYWORLD Thank you. Will there be one for biology?

[@SirMajestyEASYWORLD]

Probably, please share to your friends

[@weigibeom515]

…but, the oxidation number of carbon in methane is -4.. Why is the option not there¿

[@gbnlsalesrepoko6279]

Nice content

[@omoladearomolaran9716]

Please I love your explanation especially the one on faraday, please can you make on crude oil

[@SirMajestyEASYWORLD]

Thank you for visiting SirMajesty Easyworld Science Channel please share my videos and stay Subscribed for more. Make tutorial on Crude oil ?

[@Blvckxn]

Sure guide Pls how can I get the past questions?

[@johnsonnkama4616]

Explain no. 14

[@SirMajestyEASYWORLD]

Sodium carbonate is the only salt there that is formed from a strong base(NaOH) and a weak acid(H2CO3). Salts of strong acid and strong base don't hydrolyse,(like KNO3)same with salt of weak acid and weak base.

[@ucheho]

Explain no6

[@SirMajestyEASYWORLD]

Hund's Rule of maximum Multiplicity summarily holds that pairing cannot start in a set of degenerate orbitals until each of the orbitals are singly filled. Then when this is obeyed,you can now determine whether an atom is diamagnetic or Paramagnetic. Then some Paramagnetic substances are ferromagnetic. If there is at least one unpaired orbital (singly filled orbital) then such atom is Paramagnetic but when the entire orbitals are paired(Completely filled) such atom is diamagnetic. This can only be observed if Hund's Rule is obeyed. Therefore they are all consequences of Hund's Rule but Isomerism has no connection with Hund's Rule. Thank you, please SUBSCRIBE and Share my videos. Expand this Science Community. Much love ❤️ remain MAJESTIC