1
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Element not present in Nessler's reagent is :

A
I
B
$$\mathrm{N}$$
C
$$\mathrm{K}$$
D
$$\mathrm{Hg}$$
2
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R"

Assertion A : In the complex $$\mathrm{Ni}(\mathrm{CO})_{4}$$ and $$\mathrm{Fe}(\mathrm{CO})_{5}$$, the metals have zero oxidation state.

Reason R : Low oxidation states are found when a complex has ligands capable of $$\pi$$-donor character in addition to the $\sigma$-bonding.

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

A
A is not correct but R is correct
B
A is correct but R is not correct
C
Both A and R are correct but R is NOT the correct explanation of A
D
Both A and R are correct and R is the correct explanation of A
3
JEE Main 2023 (Online) 6th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.

A
aqueous neutral
B
both aqueous acidic and faintly alkaline
C
both aqueous acidic and neutral
D
aqueous acidic
4
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Strong reducing and oxidizing agents among the following, respectively, are :

A
$$\mathrm{Ce}^{4+}$$ and $$\mathrm{Eu}^{2+}$$
B
$$\mathrm{Eu}^{2+}$$ and $$\mathrm{Ce}^{4+}$$
C
$$\mathrm{Ce}^{4+}$$ and $$\mathrm{Tb}^{4+}$$
D
$$\mathrm{Ce}^{3+}$$ and $$\mathrm{Ce}^{4+}$$
JEE Main Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12