MCQ
$H_2S$ gas changes a filter paper dipped in lead accetate solution into
- ✓Black
- BRed
- CGreen
- DYellow
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(Given : atomic number $Sm =62 ; Eu =63 ; Tb =65 ; Gd =64, Pm =61 \text { ) }$
$A.$ $Sm$ $B.$ $Eu$ $C.$ $Tb$ $D.$ $Gd$ $E.$ $Pm$
Choose the correct answer from the options given below:
