1
JEE Main 2025 (Online) 3rd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Among $10^{-9} \mathrm{~g}$ (each) of the following elements, which one will have the highest number of atoms?

Element: $\mathrm{Pb}, \mathrm{Po}, \mathrm{Pr}$ and Pt

A
Pr
B
Pt
C
Po
D
Pb
2
JEE Main 2025 (Online) 3rd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The metal ions that have the calculated spin-only magnetic moment value of 4.9 B.M. are :

A. $\mathrm{Cr}^{2+}$

B. $\mathrm{Fe}^{2+}$

C. $\mathrm{Fe}^{3+}$

D. $\mathrm{Co}^{2+}$

E. $\mathrm{Mn}^{3+}$

Choose the correct answer from the options given below:

A
A, D and E Only
B
A, B and E Only
C
A, C and E Only
D
B and E Only
3
JEE Main 2025 (Online) 3rd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

$$ \text { Which of the following is the correct structure of L-Fructose? } $$

A
JEE Main 2025 (Online) 3rd April Morning Shift Chemistry - Biomolecules Question 5 English Option 1
B
JEE Main 2025 (Online) 3rd April Morning Shift Chemistry - Biomolecules Question 5 English Option 2
C
JEE Main 2025 (Online) 3rd April Morning Shift Chemistry - Biomolecules Question 5 English Option 3
D
JEE Main 2025 (Online) 3rd April Morning Shift Chemistry - Biomolecules Question 5 English Option 4
4
JEE Main 2025 (Online) 3rd April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : A catalyst cannot alter the equilibrium constant $\left(\mathrm{K}_{\mathrm{c}}\right)$ of the reaction, temperature remaining constant.

Statement II : A homogenous catalyst can change the equilibrium composition of a system, temperature remaining constant.

In the light of the above statements, choose the correct answer from the options given below

A
Statement I is true but Statement II is false
B
Statement I is false but Statement II is true
C
Both Statement I and Statement II are true
D
Both Statement I and Statement II are false
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