1
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

For a weak acid HA, the percentage of dissociation is nearly 1% at equilibrium. If the concentration of acid is 0.1 mol L$$^{-1}$$, then the correct option for its K$$_a$$ at the same temperature is :

A
$$1\times10^{-4}$$
B
$$1\times10^{-6}$$
C
$$1\times10^{-5}$$
D
$$1\times10^{-3}$$
2
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The density of 1 M solution of a compound 'X' is 1.25 g mL$$^{-1}$$. The correct option for the molality of solution is (Molar mass of compound X = 85 g):

A
0.705 m
B
1.208 m
C
1.165 m
D
0.858 m
3
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

Consider the given reaction:

$$\mathrm{CH}_3 \mathrm{COCH}_3 \stackrel{\text { dil } \mathrm{Ba}(\mathrm{OH})_2}{\longrightarrow} \text { ''X" }$$

The functional groups present in compound "$$\mathrm{X}$$" are:

A
ketone and double bond
B
double bond and aldehyde
C
alcohol and aldehyde
D
alcohol and ketone
4
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1
Change Language

The $$\mathrm{E}^{\Theta}$$ values for

$$\begin{aligned} & \mathrm{Al}^{+} / \mathrm{Al}=+0.55 \mathrm{~V} \text { and } \mathrm{Tl}^{+} / \mathrm{Tl}=-0.34 \mathrm{~V} \\ & \mathrm{Al}^{3+} / \mathrm{Al}=-1.66 \mathrm{~V} \text { and } \mathrm{T}^{3+} / \mathrm{Tl}=+1.26 \mathrm{~V} \end{aligned}$$

Identify the incorrect statement

A
$$\mathrm{Al}$$ is more electropositive than $$\mathrm{Tl}$$
B
$$\mathrm{Tl}^{3+}$$ is a good reducing agent than $$\mathrm{Tl}^{1+}$$
C
$$\mathrm{Al}^{+}$$ is unstable in solution
D
$$\mathrm{Tl}$$ can be easily oxidised to $$\mathrm{Tl}^{+}$$ than $$\mathrm{Tl}^{3+}$$
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