1
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The de-Broglie wavelength of an electron in the third Bohr orbit of H -atom is

A

$3 \pi \times 5.29 \mathrm{pm}$

B

$4 \pi \times 52.9 \mathrm{pm}$

C

$6 \pi \times 52.9 \mathrm{pm}$

D

$2 \pi \times 5.29 \mathrm{pm}$

2
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The correct order of the non-metallic character among the elements $\mathrm{B}, \mathrm{C}, \mathrm{N}, \mathrm{F}$ and Si is

A

$\mathrm{B}>\mathrm{C}>\mathrm{Si}>\mathrm{N}>\mathrm{F}$

B

$\mathrm{Si}>\mathrm{C}>\mathrm{B}>\mathrm{N}>\mathrm{F}$

C

$\mathrm{F}>\mathrm{N}>\mathrm{C}>\mathrm{B}>\mathrm{Si}$

D

$\mathrm{F}>\mathrm{N}>\mathrm{C}>\mathrm{Si}>\mathrm{B}$

3
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

How many of the following molecules have two lone pairs of electrons on central atom?

$\mathrm{SF}_6, \mathrm{BF}_3, \mathrm{ClF}_3, \mathrm{PCl}_5, \mathrm{BrF}_5, \mathrm{XeF}_4, \mathrm{H}_2 \mathrm{O}, \mathrm{SF}_4$

A

5

B

4

C

3

D

2

4
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The pair of molecules / ions with the same bond order value is

A

$\mathrm{B}_2, \mathrm{C}_2$

B

$\mathrm{O}_2, \mathrm{C}_2$

C

$\mathrm{O}_2^{+}, \mathrm{O}_2^{-}$

D

$\mathrm{H}_2^{+}, \mathrm{Li}_2$