Question

Match the following:

• A. A – (ii), B – (iii), C – (i), D – (iv)
• B. A – (i), B – (iii), C – (iv), D – (ii)
• C. A – (iv), B – (ii), C – (iii), D – (i)
• D. A – (ii), B – (i), C – (iv), D – (iii)

Hint:

Classify hydrides based on electron count around central atom: electron precise (octet satisfied), electron deficient (less than octet), electron rich (lone pairs), and saline (ionic character).

Answer 1

The Correct Option is B

Step 1: Recall hydride types by electron count around the central atom.
Electron-precise (octet exactly): SiH\(_4\). Ionic hydride (electropositive metal): MgH\(_2\). Electron-deficient (3c-2e bonds): B\(_2\)H\(_6\). Electron-rich (lone pairs on central atom): H\(_2\)O.

Step 2: Match to options (i = electron-precise, ii = electron-rich, iii = ionic, iv = electron-deficient).
A(SiH\(_4\))-i, B(MgH\(_2\))-iii, C(B\(_2\)H\(_6\))-iv, D(H\(_2\)O)-ii.
\[ \boxed{A\text{-}i,\ B\text{-}iii,\ C\text{-}iv,\ D\text{-}ii} \]