1
JEE Main 2025 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1

The correct order of the following complexes in terms of their crystal field stabilization energies is :

A
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
B
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}<\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$
C
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}<\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
D
$\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}<\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
2
JEE Main 2025 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1

The maximum covalency of a non-metallic group 15 element ' E ' with weakest $\mathrm{E}-\mathrm{E}$ bond is :

A
5
B
3
C
4
D
6
3
JEE Main 2025 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1

Identify the number of structure/s from the following which can be corelated to D-glyceraldehyde.

JEE Main 2025 (Online) 22nd January Evening Shift Chemistry - Biomolecules Question 6 English

A
three
B
two
C
one
D
four
4
JEE Main 2025 (Online) 22nd January Evening Shift
MCQ (Single Correct Answer)
+4
-1

Given below are two statements :

Statement (I): Nitrogen, sulphur, halogen and phosphorus present in an organic compound are detected by Lassaigne's Test.

Statement (II) : The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test.

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

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Statement I is false but Statement II is true
D
Both Statement I and Statement II are true
JEE Main Papers
2023
2021
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12