1
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Molar ionic conductivities of divalent cation and anion are $$57 \mathrm{~S~cm}^2 \mathrm{~mol}^{-1}$$ and $$73 \mathrm{~S~cm}^2 \mathrm{~mol}^{-1}$$ respectively. The molar conductivity of solution of an electrolyte with the above cation and anion will be:

A
$$187 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$
B
$$260 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$
C
$$65 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$
D
$$130 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}$$
2
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify 'A' in the following reaction :

JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 7 English

A
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 7 English Option 1
B
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 7 English Option 2
C
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 7 English Option 3
D
JEE Main 2024 (Online) 5th April Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 7 English Option 4
3
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The statement(s) that are correct about the species $$\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}$$ and $$\mathrm{Mg}^{2+}$$.

(A) All are isoelectronic

(B) All have the same nuclear charge

(C) $$\mathrm{O}^{2-}$$ has the largest ionic radii

(D) $$\mathrm{Mg}^{2+}$$ has the smallest ionic radii

Choose the most appropriate answer from the options given below :

A
(C) and (D) only
B
(A), (C) and (D) only
C
(B), (C) and (D) only
D
(A), (B), (C) and (D)
4
JEE Main 2024 (Online) 5th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The reaction at cathode in the cells commonly used in clocks involves.

A
oxidation of $$\mathrm{Mn}$$ from +2 to +7
B
reduction of $$\mathrm{Mn}$$ from +4 to +3
C
oxidation of $$\mathrm{Mn}$$ from +3 to +4
D
reduction of $$\mathrm{Mn}$$ from +7 to +2
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