IIT JEE , AIEEE Forum - Chemistry , Inorganic Chemistry - p

chimanshu_007

ummm...lemme contribute some...

Q)Why is diamond a bad conductor of electricity but a good conductor of heat?

ANS) conduction of electricity requires movement of electrons whereas conduction of heat doesnt req. movt. of electrons//

Q) Explain y silicon shows a higher covalency than carbon?

ANS) Si because of presence of d-orbitals (vacnat) can show a covalency upto 6 while C doesnt have ne d-orbitals so it has max. covalency of 4

Q) BH4^- & NH4^+ are isolobal...explain??

ans) both have tetrahederal shapes (sp3 hyb.) so both have 4 lobes...so they are isolobal

Q)Wich compound led the discovery of noble gases??

ans) PtF6 reacts with O2 forming O₂⁺ [PtF₆] ^-

Q) y grp 16 elements are called chalcogens?

ans) because many metals are found as oxides and sulphides and few as selenides and tellurides ......CHALCOGENS MEANS ORE FORMING

Q)What is laughing gas , how is it prepared?

Ans) laughing gas is N₂O and it is prepared by NH₄NO₃ (heating it)

Q)Why hydride of oxygen is liquid bt that of sulphur is a gas?

Ans) bcz H-Bonding takes place in case of Oxygen

*****FLOURINE never exists in a +ive oxidation state**********

*****NH3 has higher b. pt than PH3 bcoz of H-Bonding*******

### HF is stored in wax coated glass bottles coz it dont react with wax bt it reacts with glass####

^^^^^IODINE is more soluble in KI than in H20 coz it reacts with KI to form a soluble complex (KI3)

hope this helps.... (a great topic)

good work bhuvana and all others :)