1 . Fe2+

• A. $1s^{2}2s^{2}2p^{6}3s^{2}3p^6$
• B. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^6$
• C. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^5$
• D. $1s^{2}2s^{2}2p^{6}3s^{2}3d^5$

Answer: Option B

Explanation:

2 . MnO4-+8H++5Fe2+→Mn2+++4H2O+5Fe3+

• A. $Mn{O_4}^{-}$
• B. $H^{+}$
• C. $F{e}^{2+}$
• D. $M{n}^{7+}$

Answer: Option A

Explanation:

3 . 5Fe2++MnO−4+8H+→5Fe3++Mn2++4H2O বিক্রিয়াতে 1000 mL 1M KMnO4 দ্রবণ কত গ্রাম Fe2+ কে জারিত করবে? Fe এর পারমাণবিক ভর 55.85।

• A. 279.25g
• B. 25.85g
• C. 350.55g
• D.

Answer: Option A

Explanation:

4 . E°Fe3+/Fe2+=+0.77V

• A. $1.68$
• B. $0.68$
• C. $0.91$
• D. $1.40$

Answer: Option B

Explanation:

5 . Zns/Zn2+aq||Fe3+aq/Fe2+aq,pts

• A. $\left[Z{n}^{2+}\right]=1.0 M$
• B. $\left(Z{n}^{2+}\right]=1.1 M$
• C. $\left[F{e}^{3+}\right]=1.1 M$
• D. $\left(F{e}^{2+}\right]=1.1 M$

Answer: Option C

Explanation:

6 . Fe2+

• A. $\left[Ar\right]3d^{5}4s^1$
• B. $\left[Ar\right]3d^6$
• C. $\left[Ar\right]3d^{5}4s^2$
• D. $\left[Ar\right]3d^{6}4s^2$

Answer: Option B

Explanation: