Class 12th

Identify the major product formed in the following sequence of reactions

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The number of chiral alcohol(s) with molecular formula C₄H₁₀O is__________.

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Which one of the following compounds in inactive towards S_N1 reaction?

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The correct structure of product 'A' formed in the following reaction,

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Class 12th Chemistry Coordination Compounds

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For the reaction given below

CoCl₃ . xNH₃ + AgNO₃(aq) ->

If the equivalents of AgCl precipitate but, then the value of x will be__________.

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CoCl₃.NH₃ + AgNO₃ $\overset{}{\to} A g C l ↓ (2 m o l)$

$[C o {(N H_{3})}_{5} C l] C l_{2} + A g N O_{3} \overset{}{\to} A g C l ↓ (2 m o l)$

x = 5

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The major product (P) in the reaction

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Class 12th Chemistry Coordination Compounds

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Spin only magnetic moment of ${[M n B r_{6}]}^{4 -}$ is________ B.M (round off to the closest integer)

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Class 12th Chemistry Chemical Kinetics

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$M n^{2 +} \overset{}{\to} t_{2 g^{111}} {e_{g}}^{11}$

(Number of unpaired electron = 5)

$μ_{S} = \sqrt[]{35} = 5.91 ≅ 6$

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The equation

k = $(6.5 * 1 0^{12} s^{- 1}) e^{- 26000 K / T}$

Is followed for the decomposition of compound A. The activation energy for the reaction is________ kJ mol^-1 [nearest integer] (Given : R = 8.314 JK^-1 mol^-1)

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$K = A . e^{- E a / R T} = (6.5 * 1 0^{2}) e^{- 26000 K / T}$

$\frac{E a}{8.314} = 26000$

E_a = 216.164kJ/mol $≅$ 216

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Which one of the following techniques is not used to spot components of a mixture separated in thin layer chromatographic plate?

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In thin layer chromatography, the spots of colourless compounds, which are invisible to eyes can be detected by putting the plate under UV light.

Another detection technique is to place the plate in a covered jar containing I₂ (s). Sometimes an appropriate reagent may also be sprayed on the plate, ninhydrin in case of amino acids.

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The cell potential for the given cell at 298 K

$P t | H_{2} (g, 1 b a r) | H^{+} (a q) | | C u^{2 +} (a q) | C u (s) i s 0.31 V .$ The pH of the acidic solution is found to be 3, whereas the concentration of Cu²⁺ is 10^-x M. The value of x is________.

(Given : $E_{C u^{2 +} / C u}^{Θ} = 0.34 V a n d \frac{2.303 R T}{F} = 0.06 V)$

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