Which of the following cannot form ionic bond?
1. H`overset(+)`
2. N`H_(4)``overset(+)`
3. Al`overset(+3)`
4. Li`overset(+)`

The correct stability order of the following resonance structure is : (I) H_(2)C= overset( +)(N) =overset( -)(N) (II) H_(2)overset( +)(C )-N = overset( -)(N) (III) H_(2)overset( -)(C ) - overset( +)(N) = N (IV) H_(2)overset( - ) (C ) -N = overset( +)(N )

Which H atom in the following ester is most acidic ? overset(1)(CH_(3))-overset(2)(CH_(2))-overset(O)overset(||)(C)-overset(3)(CH_(2))-overset(O)overset(||)(C)-O-overset(4)(CH_(2))overset(5)(CH_(3))

Identify the most stable species in the following set of ions giving reasons (a) overset(+)(C)H_(3), overset(+)(C)H_(2) Br, overset(+)(C)HBr_(2), overset(+)(C)Br_(3) (b) overset(Θ)(C)H_(3), overset(Θ)(C)H_(2)Cl, overset(Θ)(C)HCl_(2), overset(Θ)(C)Cl_(3)

Write IUPAC names of the following compounds : CH_(3)-overset(CH_(3))overset( |)(C)H-CH_(2)-CH_(2)-overset(CH_(3))overset(|)(C)H-CH_(3)

One among the following is the correct IUPAC name for the compound CH_(3)CH_(2)-overset(H)overset(|)N-overset(H)overset(|)C=O

The decreaing basic order of the following is: i. overset(o-)(C)N , ii. overset(o-)(O)H , iii. overset(o-)(O) Me , iv. overset(o-)(C)H_(3) , v. H^(o-)

Write the IUPAC names of the following compounds: (i) CH_(3)-overset(CH_(3))overset(|)(CH)-CH_(3)-CH_(2)-overset(O)overset(||)C-CH_(2)Cl (ii) overset(H_(2)C-COOH)overset(|)underset(H_(2)C-COOH)underset(|)(HO-C-COOH)