MCQ
Covalent molecules are usually held in a crystal structure by
- ADipole-dipole attraction
- BElectrostatic attraction
- CHydrogen bonds
- ✓Vander Waal's attraction
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$M\left( s \right) + 2{H^ + }\left( {1M} \right) \to {H_2}\left( {1atm} \right) + {M^{2 + }}\left( {0.1M} \right)$
is $1.5\,V$. The standard reduction potential for $M^{2+}/M(s)$ couple is ............. $\mathrm{V}$
| Column $I$ (Molecule/ion) | Column $II$ (Hybridisation) |
| $(A)$ $H_3O^+$ ion | $(P)$ $sp$ |
| $(B)$ $NH_2^-$ ion | $(Q)$ $sp^2$ |
| $(C)$ $NO_3^-$ ion | $(R)$ $sp^3$ |
| $(D)$ $ClF_3$ | $(S)$ $sp^3d$ |
$A$ and $B$ is
${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g)$ is $\Delta {H_1}$ and that of
${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(l)$ is $\Delta {H_2}$. Then