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Class 12th Chemistry

In the given reaction,

The number of π- electron present in the product 'p' in__________.

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Vishal Baghel

Contributor-Level 10

It is aldol condensation.

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Class 12th Chemistry

In the given reaction

The number of sp² hybridised carbon(s) in compound 'X' is____________.

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Vishal Baghel

Contributor-Level 10

Number of sp² carbon = 8

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11 months ago

Class 12th Maths

Let a biased coin be tossed 5 times. If the probability of getting 4 heads is equal to the probability of getting 5 heads, then the probability of getting atmost two heads is

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Payal Gupta

Contributor-Level 10

P (H) = x . P (T) = 1 – x

P (4H. 1T) = P (5H)

6x = 5 = 0 $x = \frac{5}{6}$

P (atmost 2H)

$P (O H, 5 T) + P (1 H, 4 T) + P (2 H, 3 T)$

$= \frac{1}{6^{5}} (1 + 25 + 250) = \frac{276}{6^{5}} = \frac{4^{6}}{6^{4}}$

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Class 12th Chemistry

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

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Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

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11 months ago

Class 12th Chemistry

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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Vishal Baghel

Contributor-Level 10

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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Class 12th Chemical Kinetics

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

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Vishal Baghel

Contributor-Level 10

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

(Number of unpaired electron = 5)

$μ_{S} = \sqrt[]{35} = 5.91 ≅ 6$

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Class 12th Solutions

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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Vishal Baghel

Contributor-Level 10

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

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

E_a = 216.164kJ/mol $≅$ 216

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Class 12th Chemistry

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 10x M. The value of x is________.

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

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Vishal Baghel

Contributor-Level 10

H₂ (g) + Cu²⁺ (aq) $\overset{}{\to}$ 2H⁺ (aq) + Cu (s)

$∴ E_{c e l l} = E_{c e l l}^{0} - \frac{2.303 R T}{n f} l o g Q$

0.31 = 0.34 - $\frac{0.06}{2} l o g \frac{[H^{+}]}{C u^{2 +}}$

$[C u^{2 +}] = 1 0^{- 7} (? [H^{+}] = 1 0^{- 3})$

x = 7

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