MCQ
Among I-A elements which can form ionic as well as covalent bonds?
- ✓Hydrogen
- BCerium
- CHelium
- DSodium
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(image)
$D$-Erythrose and its isomers are listed as $P , Q , R$, and $S$ in Column-$I$. Choose the correct relationship of $P , Q , R$, and $S$ with D-erythrose from Column $II$.
(image)
$(A)$ $n =3,1=0, m =0$
$(B)$ $n =4, l =0, m =0$
$(C)$ $n =3, l =1, m =0$
$(D)$ $n =3, l =2, m =1$
The correct option for the order is :