MCQ
Presence of a nitro group in a benzene ring:
- ✓deactivates the ring towards electrophilic substitution.
- Bactivates the ring towards electrophilic substitution.
- Crenders the ring basic.
- Ddeactivates the ring towards nucleophilic substitution.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

if one mole of each of $X$ and $Y$ with $0.05 mol$ of $Z$ gives compound $XYZ _{3}$. (Given : Atomic masses of $X , Y$ and $Z$ are 10,20 and $30 amu$, respectively). The yield of $XYZ _{3}$ is $.........g$.(Nearest integer)
$(A)$ Hydrated $Al _2 O _3$ precipitates, when $CO _2$ is bubbled through a solution of sodium aluminate.
$(B)$ Addition of $Na _3 AlF _6$ lowers the melting point of alumina.
$(C)$ $CO _2$ is evolved at the anode during electrolysis.
$(D)$ The cathode is a steel vessel with a lining of carbon.