Mock Test 1 — p-Block Elements (Class 12)

NH₃ in lab is prepared by:

Geometry of $PCl_5$ in gas phase:

Basicity of $H_3PO_4$:

Catalyst in Contact process:

Oxide that is amphoteric:

F-F bond is weaker than Cl-Cl due to:

Strongest oxoacid of chlorine:

Bleaching powder is:

Hybridization of Xe in $XeF_6$:

Most reactive noble gas:

Oxidation state of N in $HNO_3$:

Number of P-OH bonds in $H_3PO_3$:

Oxidation state of S in $H_2SO_4$:

Assertion (A): F is the most electronegative element. Reason (R): F has the highest effective nuclear charge per electron and small size.

Assertion (A): Xenon forms compounds with fluorine but not with all elements. Reason (R): Xe has relatively low ionization enthalpy (compared to other noble gases) and can use its $d$ orbitals for bonding.