The state of hybridization of C₂, C₃, C₅ and C₆ of the hydrocarbon,


is in the following sequence

• sp, sp³, sp² and sp³

• sp³, sp², sp² and sp

• sp,sp²,sp² and sp³

• sp,sp²,sp² and sp³

The dissociation constants for acetic acid and HCN at 25^o C are 1.5 X 10^-5 and 4.5 x 10^-10 respectively. The equilibrium constant for the equilibrium,

CN^- + CH₃COOH  and HCN + CH₃COO^-

would be

• 3 x 10⁵

• 3.0 x 10^-5

• 3.0 x 10^-4

• 3.0 x 10^-4

13.

In which of the following molecules/ions BF_3, NO₂^-, NH₂^- and H₂O, the central atom is sp² hybridised?

• NO₂^- and NH₂^-

• NH₂^- and H₂O

• NO₂^- and H₂O

• NO₂^- and H₂O

10 g of hydrogen and 64 of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be

• 2 mol

• 3 mol

• 4 mol

• 4 mol

The energy absorbed by each molecule (A₂) of a substance is 4.4 x 10^-19 J and bond energy per molecule is 4.0 X 10^-19 J. The kinetic energy of the molecule per atom will be

• 2.0 x 10^-20 J 

• 2.2 x 10^-19 J

• 2.0 x 10^-19 J

• 2.0 x 10^-19 J

What  is the dominant intermolecular force or bond that must be overcome in converting liquid CH₃OH to a gas?

• Hydrogen bonding

• Dipole-dipole interaction

• Covalent bonds

• Covalent bonds

Which of the following is not permissible arrangement of electrons in an atom? 

• n = 4, l=0, m=0, s=-1/2

• n=5, l=3, m=0, s=+1/2

• n=3, l=2, m=-3, s= -1/2

• n=3, l=2, m=-3, s= -1/2

The IUPAC name of the compound having the formula 

• 3-butene-1-yne

• 1-butyn-3-ene

• but-1-yne-3-ene

• but-1-yne-3-ene

In the case of alkali metals, the covalent character decreases in the order

• MCl> MI>MBr>MF

• MF> MCl> MBr>MI

• MF > MCl> MI>MBr

• MF > MCl> MI>MBr

which of the following oxides is not expected to react with sodium hydroxide?

• B₂O₃

• CaO

• SiO₂

• SiO₂