1
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the difference in energy between the first and second Bohr orbits to that between the second and third orbit is

A

$\frac{5}{27}$

B

$\frac{27}{5}$

C

$\frac{4}{9}$

D

$\frac{9}{4}$

2
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Assertion (A) First ionisation enthalpy of oxygen is less than that of nitrogen.

Reason (R) Atoms with half-filled or completely filled orbitals are less stable.

The correct option among the following is

A

(A) and (R) are true and (R) is the correct explanation of (A).

B

(A) and (R) are true, but (R) is not the correct explanation of (A).

C

(A) is true but (R) is false.

D

(A) is false but (R) is true.

3
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In which of the following, molecules are arranged in the increasing order of their bond angles?

A

$\mathrm{NH}_3<\mathrm{SO}_2<\mathrm{H}_2 \mathrm{O}$

B

$\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_3<\mathrm{SO}_2$

C

$\mathrm{SO}_2<\mathrm{NH}_3<\mathrm{H}_2 \mathrm{O}$

D

$\mathrm{SO}_2<\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_3$

4
TS EAMCET 2023 (Online) 14th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Arrange the molecules $\mathrm{B}_2, \mathrm{He}_2, \mathrm{~N}_2$ and $\mathrm{C}_2$ in the increasing order of their bond order values.

A

$\mathrm{C}_2<\mathrm{He}_2<\mathrm{B}_2<\mathrm{N}_2$

B

$\mathrm{N}_2<\mathrm{B}_2<\mathrm{C}_2<\mathrm{He}_2$

C

$\mathrm{He}_2<\mathrm{B}_2<\mathrm{C}_2<\mathrm{N}_2$

D

$\mathrm{He}_2<\mathrm{C}_2<\mathrm{N}_2<\mathrm{B}_2$

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