$\Delta \mathrm{H}$ and $\Delta \mathrm{S}$ for a reaction are $35.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $83.6 \mathrm{~J} \mathrm{~K}^{-1}$ respectively. Assuming that $\Delta \mathrm{H}$ and $\Delta \mathrm{S}$ do not vary with temperature, the reaction is spontaneous when:
$\mathrm{T}<425 \mathrm{~K}$
$\mathrm{T}<350 \mathrm{~K}$
$\mathrm{T}>425 \mathrm{~K}$
$T>298 \mathrm{~K}$
When the initial concentration of a zero order reaction is doubled, the half-life of the reaction is:
doubled
not changed
tripled
halved
The secondary structure of protein consists of:
A long chain of amino acids linked with each other in a specific sequence
A folding of the polypeptide chains which exists as fibrous and globular
A long polypeptide chain which exists $\alpha$-helix and $\beta$-pleated sheet structure
Two or more polypeptide chains which exist as sub-units
What will be the change in the electrode potential of chromium electrode dipping into chromic sulphate solution, when the electrolyte is diluted 10 times at $25^{\circ} \mathrm{C}$ ? $\left[\mathrm{E}^0\left(\mathrm{Cr}^{3+} / \mathrm{Cr}\right)\right]=-0.74 \mathrm{~V}$
Increase by 32.8 mV
Decrease by 19.7 mV
Decrease by 29.6 mV
Increase by 16.2 mV
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