MCQ
Amalgams are
- AHighly coloured alloys
- BAlways solid
- ✓Alloys which contain mercury as one of the contents
- DAlloys which have great resistance to abrasion
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$(A)$ $T _1= T _2$ $(B)$ $T _3> T _1$
$(C)$ $W _{\text {isothermal }} > W _{\text {adiabatic }}$ $(D)$ $\Delta U_{\text {isothermal }}>\Delta U_{\text {adiabatic }}$
$NH _{2} CN _{( s )}+\frac{3}{2} O _{2}( g ) \rightarrow N _{2( g )}+ O _{2}( g )+ H _{2} O _{(l)}$
is ............ $kJ$. (Rounded off to the nearest integer)
[Assume ideal gases and $\left. R =8.314\, J\, mol ^{-1} K ^{-1}\right]$