- A$FBF$ bond angle $< 120^o$
- B$HNH$ bond angle $> 109^o28'$
- CExlubits intermolecular $H-$ bond
- ✓Hybridization of $N-$ atom is $sp^3$
$*\, FBF$ bond angle $< 120^o$ ($VSPER$ theory)
$* \,H N H$ bond angle is less than $120^o$ but greater than $109^o28$' due to back bonding.
$*$ Due to presence of $H-$ atom attached to nitrogen this molecule can exhibits intermolecular $H-$ bonding.
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Assertion $A:$ Metallic sodium dissolves in liquid ammonia giving a deep blue solution, which is paramagnetic.
Reason $R:$ The deep blue solution is due to the formation of amide.
In the light of the above statements, choose the correct answer from the options given below :
$(\log \,4 = 0.60,\, \log \,5 = 0.69)$
Assertion $A:$ $3.1500\,g$ of hydrated oxalic acid dissolved in water to make $250.0\,mL$ solution will result in $0.1\,M$ oxalic acid solution.
Reason $R:$ Molar mass of hydrated oxalic acid is $126\,g\,mol ^{-1}$.
In the light of the above statements, chose the correct answer from the options given below:
$(I)$ Only $C$ react with $0.10\, M\, HCl$ to give $H_2(g)$
$(II)$ When $A$ is added to solution of the other metal ions, metallic $D$ is formed but not $B$ or $C$