1
WB JEE 2024
MCQ (More than One Correct Answer)
+2
-0
Change Language

Which of the following statements about the $$\mathrm{S}_{\mathrm{N}} 2$$ reaction mechanism is/are true?

A
The rate of reaction increases with increasing nucleophilicity.
B
The number 2 denotes a second order reaction.
C
Tertiary butyl substrates do not follow this mechanism.
D
The optical rotation of substrates always changes from (+) to $$(-)$$ or from $$(-)$$ to (+) in the products.
2
WB JEE 2024
MCQ (More than One Correct Answer)
+2
-0
Change Language

Which of the following represent(s) the enantiomer of Y ?

WB JEE 2024 Chemistry - Isomerism Question 1 English

A
WB JEE 2024 Chemistry - Isomerism Question 1 English Option 1
B
WB JEE 2024 Chemistry - Isomerism Question 1 English Option 2
C
WB JEE 2024 Chemistry - Isomerism Question 1 English Option 3
D
WB JEE 2024 Chemistry - Isomerism Question 1 English Option 4
3
WB JEE 2024
MCQ (More than One Correct Answer)
+2
-0
Change Language

Identify the correct statement(s) :

A
The oxidation number of $$\mathrm{Cr}$$ in $$\mathrm{CrO}_5$$ is +6
B
$$\Delta \mathrm{H}>\Delta \mathrm{U}$$ for the reaction $$\mathrm{N}_2 \mathrm{O}_4(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2$$ (g), provided both gases behave ideally
C
$$\mathrm{pH}$$ of $$0.1(\mathrm{~N}) \mathrm{H}_2 \mathrm{SO}_4$$ is less than that of $$0.1(\mathrm{~N}) \mathrm{HCl}$$ at $$25^{\circ} \mathrm{C}$$
D
$$\left(\frac{\mathrm{RT}}{\mathrm{F}}\right)=0.0591$$ volt at $$25^{\circ} \mathrm{C}$$
4
WB JEE 2024
MCQ (More than One Correct Answer)
+2
-0
Change Language

Which of the following ion/ions is/are diamagnetic ?

A
$$\left[\mathrm{CoF}_6\right]^{3-}$$
B
$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$$
C
$$\left[\mathrm{Fe}\left(\mathrm{OH}_2\right)_6\right]^{2+}$$
D
$$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$$
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