1
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Correct order of spin only magnetic moment of the following complex ions is :

(Given At.no. Fe : 26, Co : 27)

A
$$\mathrm{[CoF_6]^{3-} > [FeF_6]^{3-} > [Co(C_2O_4)_3]^{3-}}$$
B
$$\mathrm{[FeF_6]^{3-} > [Co(C_2O_4)_3]^{3-} > [CoF_6]^{3-}}$$
C
$$\mathrm{[FeF_6]^{3-} > [CoF_6]^{3-} > [Co(C_2O_4)_3]^{3-}}$$
D
$$\mathrm{[Co(C_2O_4)_3]^{3-} > [CoF_6]^{3-} > [FeF_6]^{3-}}$$
2
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The major component of which of the following ore is sulphide based mineral?

A
Sphalerite
B
Siderite
C
Malachite
D
Calamine
3
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Reaction of propanamide with $$\mathrm{Br_2/KOH(aq)}$$ produces :

A
Propanenitrile
B
Propylamine
C
Ethylnitrile
D
Ethylamine
4
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Following tetrapeptide can be represented as

JEE Main 2023 (Online) 29th January Evening Shift Chemistry - Biomolecules Question 37 English

(F, L, D, Y, I, Q, P are one letter codes for amino acids)

A
YQLF
B
FIQY
C
PLDY
D
FLDY
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