MCQ
What is the formula of pyrolusite ore?
- A$Cr _2 O _3$
- B$Cu _2 O$
- C$PbCrO _4$
- ✓$MnO _2$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| Column A | Column B | ||
| i. | Lice on humans | a. | Endoparasites |
| ii. | Ectoparasites on marine fishes | b. | Grows on hedge plants |
| iii. | Cuscuta | c. | Ectoparasites |
| iv. | Plasmodium and humans | d. | Copepods |
$\ce{Ether ->[Hot HI] A + B + H2O}$,
If A and B are identical, the ether is ____________.