Which of the following is a wrong statement ? In a given period of the Periodic Table, the s-block element has, in general, a higher value of

• electronegativity

• atomic radius

• ionisation energy

• electron affinity

12.

What is the $∆$H of the reaction?

CH₂Cl₂ (g) $\to$C (g) + 2H (g) + 2Cl (g)

The average bond energies of C-Cl bond and C-H bond are 416 kJ and 325 kJ mol^-1 respectively.

• 1482 kJ

• 1482 J

• 1492 kJ

• 1492 J

Which of the following is a Lewis acid ?

• OH^-

• H⁺

• F^-

• NH₃

The bond length of HCl bond is 2.29 x 10^-10 m. The percentage ionic character of HCl, if measured dipole moment is 6.226 x 10^-30 C- m, is

• 8%

• 20%

• 17%

• 50%

The only o  p-directing group which is deactivating in nature is

• -NH₂

• -OH

• -X(halogens)

• -R(alkyl groupd)

Which of the organic compounds will give red colour in Lassaigne test ?

• C₆H₅NH₂

• 

• 

• None of these

CaC₂ and H₂O react to produce

• CH₄

• C₂H₄

• C₂H₂

• C₂H₆

The IUPAC name of the following compound is

• 1, 2-dimethyl-2-butenol

• 3-methylpent-3-en-2-ol

• 3, 4-dimethyl-2-buten-4-ol

• None of the above

Ammonia gas can be dried over

• CaCl₂

• conc. H₂SO₄

• P₂O₅

• quick lime

Inorganic benzene is

• B₃N₆H₃

• B₃N₃H₆

• Al₃N₃H₆

• None of these