Class 12th

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$l o g (\frac{k_{2}}{k_{1}}) = \frac{E a}{2.303 * 8.314} [\frac{1}{300} - \frac{1}{325}]$

log (5) = $\frac{E a}{2.303 * 8.314} [\frac{1}{300} - \frac{1}{325}]$

$∴ E a = \frac{0.7 * 2.303 * 8.314 * 300 * 325}{25} = 52271.7$

Ea in kJ/mole = $\frac{52271.7}{1000} = 52.2 k J / m o l$

the nearest integer is 52.

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The major product of the following chemical reaction is:

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Which one of the following reactions will not form acetaldehyde?

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Class 12th Chemistry Coordination Compounds

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The hybridization and magnetic nature of ${[M n {(C N)}_{6}]}^{4 -} a n d {[F e {(C N)}_{6}]}^{3 -},$ respectively are:

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Class 12th Biomolecules

Which of the glycosidic linkage between galactose and glucose is present in lactose?

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Which of the following reaction / s will not given p – aminoazobenzene?

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The major product of the following reaction is

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Class 12th Chemistry Coordination Compounds

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Stable carbocation formation is the important factor.

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Given below are two statements:

Statement I : The identification of Ni²⁺ is carried out by dimethyl glyoxime in the presence of NH₄OH.

Statement II : The dimethyl glyoxime is a bidentate neutral ligand.

In the light of the above statements, choose the correct answer from the options given below

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Statement – I True

Statement – II False

Dimethyl glyoxime is the bidentate anionic ligand.

$N i^{2 +} + 2 D M G^{-} \to \underset{R e d p p t}{[N i {(D M G)}_{2}]}$

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Class 12th Electric Flux

The electric field in a region is given by $\vec{E} = (\frac{3}{5} E_{0} \hat{i} + \frac{4}{5} E_{0} \hat{j}) \frac{N}{C} .$ The ratio of flux of reported field through the rectangular surface of are 0.2m² (parallel to y – z plane) to the of the surface of are 0.3m² (parallel to x – z plane) is a : b, where a = ……………

[Here $\hat{i}, \hat{j} a n d \hat{k}$ are the unit vectors along x, y and z – axes respectively]

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Vishal Baghel

Contributor-Level 10

$?_{1} = \frac{3}{5} E_{0} (0.2) N m^{2} C^{- 1}, a n d ?_{2} = \frac{4}{5} E_{0} (0.3) N m^{2} C^{- 1}$

$\Rightarrow \frac{?_{1}}{?_{2}} = \frac{3 * 0.2 * 5}{5 * 0.3 * 4} = \frac{1}{2}$

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Which of the following is correct structure of a-anomer of maltose?

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