রসায়ন ১ম পত্র-হলি ক্রস কলেজ-২০২৪-MCQ

7460

4654

3741

3039

$\mathrm{Cu}^{2+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{10}$

$\mathrm{Fe}^{3+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{6}$

$\mathrm{Mn}^{2+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{5}$

$\mathrm{V}^{2+} \rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^{4}$

0.50

0.67

0.88

0.95

1

2

3

4

$2 \mathrm{NO}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g})$

$\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})$

$\mathrm{COCl}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{CO}(\mathrm{g}) \mathrm{Cl}_{2}(\mathrm{~g})$

$2 \mathrm{SO}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{O}_{2}(\mathrm{~g})+2 \mathrm{SO}_{3}(\mathrm{~g})$