UPSC Geo-Scientist Prelims 2026 Paper II (Chemistry) Question Paper (08-Feb-2026)

Question 1

Radial distribution function does NOT depend upon

Accepted Answer

Orientation of orbital

Answer

Distance from the nucleus

Answer

Principal quantum number

Answer

Azimuthal quantum number

Question 2

Which one of the following statements regarding wave functions is NOT correct?

Accepted Answer

Wave functions represent total movement of a particle over a period

Answer

Wave functions are three dimensional and contain three quantum numbers $n$, $l$ and $m$

Answer

Probability density is interpreted as the square of wave function

Answer

Wave functions should be differentiable

Question 3

Which of the following statements regarding electron configuration of atoms is/are correct? 1. Principal quantum number = 1, K shell, example : He 2. Principal quantum number = 3, M shell, example : Ne 3. Principal quantum number = 2, L shell, example : F 4. Principal quantum number = 3, K shell, example : Si Select the answer using the code given below :

Accepted Answer

1 and 3 only

Answer

1 only

Answer

2 and 4

Answer

1, 2 and 3

Question 4

Which one of the following represents the correct order of boiling point among Li, Be, B and Zn ?

Accepted Answer

B > Be > Li > Zn

Answer

Zn > Be > B > Li

Answer

Li > Be > Zn > B

Answer

B > Li > Be > Zn

Question 5

The correct group, period and block for element Hassium (Hs) is (Given : atomic number of Hs = 108)

Accepted Answer

$8^{th}$ group, $7^{th}$ period, $d$-block

Answer

$13^{th}$ group, $7^{th}$ period, $p$-block

Answer

$15^{th}$ group, $7^{th}$ period, $p$-block

Answer

$6^{th}$ group, $6^{th}$ period, $d$-block