MCQ
Formula of ferric sulphate is
- A$FeS{O_4}$
- B$Fe\,\,{(S{O_4})_2}$
- C$F{e_2}S{O_4}$
- ✓$F{e_2}\,{(S{O_4})_3}$
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Choose the correct answer from the options given below:
| Acid | $K_a$ |
| $HCN$ | $6.2\times 10^{-10}$ |
| $HF$ | $7.2\times 10^{-4}$ |
| $HNO_2$ | $4.0\times 10^{-4}$ |
Correct order of increasing base strength of the base $CN^-,F^-$ and $NO_2^-$ will be
$(A)$ $q=0$ $(B)$ $T_2=T_1$ $(C)$ $P_2 V_2=P_1 V_1$ $(D)$ $P_2 V_2^\gamma=P_1 V_1^\gamma$