Consider the following reaction :
$$ \begin{aligned} & 2 \mathrm{~A}(\mathrm{~g})+\mathrm{B}(\mathrm{~g}) \rightarrow 2 \mathrm{D}(\mathrm{~g}) \\ & \Delta \mathrm{U}^{\ominus}=-10 \mathrm{~kJ} \mathrm{~mol}^{-1} \text { and } \Delta \mathrm{S}^{\ominus}=-44 \mathrm{JK}^{-1} \text { at } 298 \mathrm{~K} . \end{aligned} $$
Identify the correct option with $\Delta \mathrm{G}^{\ominus}$ for the reaction and spontaneity of the reaction at 298 K .
(Given : $\mathrm{R}=8.31 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$ )
$-1.635 \mathrm{~kJ} \mathrm{~mol}^{-1}$, spontaneous
$-0.63568 \mathrm{~kJ} \mathrm{~mol}^{-1}$, spontaneous
$+0.63568 \mathrm{~kJ} \mathrm{~mol}^{-1}$, non-spontaneous
$+1.635 \mathrm{~kJ} \mathrm{~mol}^{-1}$, non-spontaneous
$$ \text { Match List I with List II : } $$
| List I (Quantum Numbers) |
List II (Orbital) | |||
|---|---|---|---|---|
| 'n' | 'I' | |||
| A. | 2 | 1 | I. | 3d |
| B. | 4 | 0 | II. | 2p |
| C. | 5 | 3 | III. | 4s |
| D. | 3 | 2 | IV. | 5f |
A-IV, B-II, C-III, D-I
A-II, B-III, C-I, D-IV
A-II, B-III, C-IV, D-I
A-I, B-II, C-III, D-IV
In a qualitative analysis, $\mathrm{Bi}^{3+}$ is detected by appearance of precipitate of $\mathrm{BiO}(\mathrm{OH})(\mathrm{s})$. Calculate pH when the following equilibrium exists at 298 K .
$$ \mathrm{BiO}(\mathrm{OH})(\mathrm{s}) \rightleftharpoons \mathrm{BiO}^{+}(\mathrm{aq})+\mathrm{OH}^{-}(\mathrm{aq}), \mathrm{K}=4 \times 10^{-10} $$
(Given : $\log 2=0.3010$ )
8.714
4.699
5.286
9.301
The correct statement with regard to the secondary structure of DNA/RNA is
RNA possesses a single strand helix structure and contains thymine as one of the four bases
DNA possesses a double strand helix structure and contains thymine as one of the four bases
RNA possesses a double strand helix structure and contains uracil as one of the four bases
DNA possesses a single strand helix structure and contains uracil as one of the four bases
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