1
WB JEE 2024
MCQ (Single Correct Answer)
+2
-0.5
Change Language

$$\mathrm{pH}$$ of $$10^{-8}(\mathrm{M}) \mathrm{~HCl}$$ solution is

A
8
B
greater than 7, less than 8
C
greater than 8
D
greater than 6, less than 7
2
WB JEE 2024
MCQ (Single Correct Answer)
+2
-0.5
Change Language

The specific conductance $$(\mathrm{k})$$ of $$0.02(\mathrm{M})$$ aqueous acetic acid solution at $$298 \mathrm{~K}$$ is $$1.65 \times 10^{-4} \mathrm{~S} \mathrm{~cm}^{-1}$$. The degree of dissociation of acetic acid is

$$[\lambda_{\mathrm{O}^{+}}+=349.1 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1} \text { and } \lambda_{{ }^{\circ} \mathrm{CH}_3 \mathrm{COO}^{-}}=40.9 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}]$$

A
0.021
B
0.21
C
0.012
D
0.12
3
WB JEE 2024
MCQ (Single Correct Answer)
+2
-0.5
Change Language

The number(s) of $$-\mathrm{OH}$$ group(s) present in $$\mathrm{H}_3 \mathrm{PO}_3$$ and $$\mathrm{H}_3 \mathrm{PO}_4$$ is/are

A
3 and 3 respectively
B
3 and 4 respectively
C
2 and 3 respectively
D
1 and 3 respectively
4
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.
EXAM MAP