MCQ
Identify the state function among the following
- A$q$
- B$q -w$
- ✓$q + w$
- D$q/w$
However, the change in internal energy which is equal to the sum of heat and work, is a state function. Its value is independent of the path chosen to reach a particular state.
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| Column $I$ | Column $II$ |
| $(A)$ $CH_3COONa$ | $(i)$ Almost neutral, $pH > 7$ or $< 7$ |
| $(B)$ $NH_4Cl$ | $(ii)$ Acidic, $pH < 7$ |
| $(C)$ $NaNO_3$ | $(iii)$ Alkaline, $pH > 7$ |
| $(D)$ $CH_3COONH_4$ | $(iv)$ Neutral, $pH = 7$ |