1
JEE Main 2024 (Online) 27th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
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The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;

A
Retention occurs in $$S_N 1$$ reaction and inversion occurs in $$\mathrm{S}_{\mathrm{N}} 2$$ reaction.
B
Racemisation occurs in $$\mathrm{S}_{\mathrm{N}} 1$$ reaction and retention occurs in $$\mathrm{S}_{\mathrm{N}} 2$$ reaction.
C
Racemisation occurs in both $$\mathrm{S}_{\mathrm{N}} 1$$ and $$\mathrm{S}_{\mathrm{N}} 2$$ reactions.
D
Racemisation occurs in $$S_N 1$$ reaction and inversion occurs in $$\mathrm{S}_{\mathrm{N}} 2$$ reaction.
2
JEE Main 2024 (Online) 27th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The electronic configuration for Neodymium is:

[Atomic Number for Neodymium 60]

A
$$[\mathrm{Xe}] 4 \mathrm{f}^4 6 \mathrm{~s}^2$$
B
$$[\mathrm{Xe}] 5 \mathrm{f}^4 7 \mathrm{~s}^2$$
C
$$[\mathrm{Xe}] 4 \mathrm{f}^6 6 \mathrm{~s}^2$$
D
$$[\mathrm{Xe}] 4 \mathrm{f}^1 5 \mathrm{~d}^1 6 \mathrm{~s}^2$$
3
JEE Main 2024 (Online) 27th January Morning Shift
Numerical
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-1
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The mass of silver (Molar mass of $$\mathrm{Ag}: 108 \mathrm{~gmol}^{-1}$$ ) displaced by a quantity of electricity which displaces $$5600 \mathrm{~mL}$$ of $$\mathrm{O}_2$$ at S.T.P. will be ______ g.

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4
JEE Main 2024 (Online) 27th January Morning Shift
Numerical
+4
-1
Change Language

Consider the following data for the given reaction

$$2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})}$$

JEE Main 2024 (Online) 27th January Morning Shift Chemistry - Chemical Kinetics and Nuclear Chemistry Question 44 English

The order of the reaction is _________.

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