MCQ
Aufbau principle is not satisfied by
- A$Cr$ and $Cl$
- ✓$Cu$ and $Ag$
- C$Cr$ and $Mg$
- D$Cu$ and $Na$
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$O _2, HF , H _2 O , NH _3, H _2 O _2, CCl _4, CHCl _3, C _6 H _6, C _6 H _5 Cl \text {. }$
When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?
$4B(s) + 3O_2\,(g) \rightarrow 2B_2O_3\,(g)$ ; $E^o_{cell} = 1.433$ $volt$ What is molar entropy (in $J/K$) of oxygen gas
Given ${\left( {{\Delta _f}{H^o}} \right)_{{B_2}{O_3}}}\left( g \right) = - 840\,\frac{{KJ}}{{mol}}$
${\left( {S_m^o} \right)_{{B_2}{O_3}}} \left( g \right) = 280J/K - mol$
${{(S_{m}^{o})}_{B}}\,\,\left( s \right)=10\,J/K-mol$
