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1
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
2
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.
3
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
$$[\mathrm{Xe}] 4 f^{14} 5 d^{10} 4 s^2$$
4
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which statements among the following are correct about helium?

(i) Liquid helium is used to sustain powerful superconducting magnets.

(ii) Liquid helium is useful to carry low temperature experiments.

(iii) It is a heavy gas.

(iv) It is a flammable gas.

A
(i) and (ii)
B
(ii) and (iii)
C
(i) and (iv)
D
(iii) and (iv)
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