Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

The p-Block Elements

Short Answer Type

621. Complete the following chemical reaction equation:
XeF₄ + H₂O → __________

250 Views

622. Draw structures of the following species:
(i) H₂,S₂,O₇ (ii)NO₃–.

519 Views

623. Assign a reason for the following statement:
Phosphorus (P₄) is more reactive than nitrogen (N₂).

167 Views

624. Assign a reason for the following statement:
All the bonds in PCl₅ are not equal in length.

The three equatorial P–Cl bonds are equivalent, while the two axial bonds are longer than equatorial bonds. This is due to the fact that the axial bond pairs suffer more repulsion as compared to equatorial bond pairs.

211 Views

625. Write the structural formulae of the following compounds:
(i) BrF₃ (ii) XeF_2.

161 Views

Fill In the Blanks

626. The number of replaceable hydrogen in phosphorus acid is ________.

171 Views

627. In P₄O₁₀, the number of oxygen atoms bonded to each phosphorus atom is _________.

340 Views

628.

The basicity of phosphorus acid (H₃PO₃) is _____________.

180 Views

629.

Dehydration of conc. nitric acid with P₄O₁₀ yields __________.

130 Views

630. Ammonia is basic while phosphine is ___________ towards litmus.

140 Views