MCQ
The solution of $N{a_2}C{O_3}$ has $pH$
- ✓Greater than $7$
- BLess than $7$
- CEqual to $ 7$
- DEqual to zero
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$B _{2}, Li _{2}, C _{2}, C _{2}^{-}, O _{2}^{2-}, O _{2}^{+}$and $He _{2}^{+}$
$(A)$ $\Delta U = q + p \Delta V$
$(B)$ $\Delta G =\Delta H - T \Delta S$
$(C)$ $\Delta S =\frac{ q _{ rev }}{ T }$
$(D)$ $\Delta H =\Delta U -\Delta nRT$
Choose the most appropriate answer from the options given below :