Give reasons for the following:
`(CH_(3))_(3)P=O` exists but `(CH_(3))_(3)N =O` does not.

Give reasons for the following: N_(2)O_(5) is more acidic than N_(2)O_(3) .

Give the IUPAC names of the following ethers : (i) CH_(3)OCH_(2)-underset(CH_(3))underset(|)(CH)CH_(3)" " (ii) CH_(3)OCH_(2)CH_(2)Cl (iii) O_(2)N.C_(6)H_(4)-OCH_(3)(p)" " (iv) CH_(3)CH_(2)CH_(2)OCH_(3)

Give the IUPAC names of the following compounds: (i) CH_(3)CH(Cl)CH(Br)CH_(3)

Why does R_(3) P = O exist but R_(3) N = O does not (R = alkyl group ) ?

Write the mechanism of the following reaction: CH_(3)CH_(2)OH overset(HBr)(rarr)CH_(3)CH_(2)Br+H_(2)O

Give the structure of the compounds in the following reactions CH_(2)=CH-CH_(2)OH overset(CrO_(3).2C_(5)H_(5)N)underset(CH_(2)Cl_(2))rarr[A]underset(H^(+))overset(CH_(3)OH)rarrunderset(C_(5)H_(10)O_(2))([B])underset(("Cold,dil"))overset(KMnO_(4)//OH^(-))rarrunderset((C_(5)H_(12)O_(4)))([C])overset(H_(3)O^(+))rarrunderset((C_(3)H_(6)O_(3)))([D])

In S_(N)2 reactions, the correct order of reacitivity for the following compounds: CH_(3)Cl, CH_(3)CH_(2)Cl, (CH_3)_(2)CHCl and (CH_3)_(3)C Cl is-