MCQ
Which of the following is paramagnetic
- ✓$O_2^ + $
- B$C{N^ - }$
- C$CO$
- D${N_2}$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Liquid $\rightleftharpoons $ Vapour
Which of the following relations is correct ?
$C{H_3} - CH = C{H_2} + HBr\xrightarrow{{{{({C_6}{H_5}CO)}_2}{O_2}}}$
Statement $I$ : Gallium is used in the manufacturing of thermometers.
Statement $II$ : A thermometer containing gallium is useful for measuring the freezing point ( $256 \mathrm{~K}$ ) of brine solution.
In the light of the above statement, choose the correct answer from the options given below :