1
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The electronic configuration of $$\mathrm{Fe}^{3+}$$ is (atomic number of $$\mathrm{Fe}=26$$ )

A
$$[\mathrm{Ar}] 3 d^5 4 s^1$$
B
$$[\mathrm{Ar}] 3 d^6 4 s^0$$
C
$$[\mathrm{Ar}] 3 d^5 4 s^0$$
D
$$[\mathrm{Ar}] 3 d^6 4 s^2$$
2
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The element with outer electronic configuration $$(n-1) d^2 n s^2$$, where $$n=4$$, would belong to

A
2nd period, 2nd group
B
4th period, 4th group
C
4th period, 2nd group
D
2nd period, 4th group
3
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Choose the correct option regarding the following statements

Statement 1 Nitrogen has lesser electron gain enthalpy than oxygen.

Statement 2 Oxygen has lesser ionisation enthalpy than nitrogen.

A
Statement 1 is correct but statement 2 is incorrect.
B
Both statements 1 and 2 are incorrect.
C
Both statements 1 and 2 are correct.
D
Statement 1 is incorrect but statement 2 is correct.
4
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Among the given configurations, identify the element which does not belong to the same family as the others?

A
$$[\mathrm{Ne}] 3 s^2 3 p^5$$
B
$$[\mathrm{Ar}] 3 d^{10} 4 s^2$$
C
$$[\mathrm{Kr}] 4 d^{10} 5 \mathrm{~s}^2$$
D
$$[\mathrm{Xe}] 4 f^{14} 5 d^{10} 4 s^2$$
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