MCQ
The correct $IUPAC$ name of $\mathrm{K}_2 \mathrm{MnO}_4$ is
- APotassium tetraoxopermanganate $(VI)$
- BPotassium tetraoxidomanganate $(VI)$
- CDipotassium tetraoxidomanganate $(VII)$
- DPotassium tetraoxidomanganese $(VI)$
$ 2+\mathrm{x}-8=0 $
$ \Rightarrow \mathrm{x}=+6$
O.S. of $\mathrm{Mn}=+6$
$IUPAC$ Name $=$
Potassium tetraoxidomanganate$(VI)$
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(First dissociation constant of $H _{2} CO _{3}=4.0 \times 10^{-7}$$\log 2=0.3 ;$ density of the soft $\left.\operatorname{drink}=1\, g\, mL ^{-1}\right)$
| Column I | Column II |
| (a) Osmotic Pressure. | (i) Cottrell's method. |
| (b) Relative lowering of vapour pressure. | (ii) Rast's method. |
| (c) Elevation in boiling point. | (iii) Ostwald and Walker's method. |
| (d) Depression in freezing point. | (iv) Berkeley and Hartley's method. |