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Chemistry Class 12th

Which one of the following set of elements can be detected using sodium fusion extract?

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alok kumar singh

Contributor-Level 10

Sodium fusion extract is Lassaigne method to defect sulphur, nitrogen, phosphorous and halogens.

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a year ago

Chemistry Class 11th

The correct order of heat of hydrogenation is

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Vishal Baghel

Contributor-Level 10

Stability order :
Conjugate > Isolated > Cumulative and (y) is Anti aromatic.
HOC ∝ 1 / (Stability of Alkene)

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a year ago

Chemistry Chemical Equilibrium

40% of HI undergoes decomposition to H2 and I2 at 300K. $^{}$ for this decomposition reaction at one atmosphere pressure is_____________J mol1 (nearest integer)

(Use R = 8.31 JK1 mol1; log 2= 0.3010, In 10 = 2.3, log 3 = 0.477)

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Raj Pandey

Contributor-Level 9

$H l ? \frac{1}{2} H_{2} + \frac{1}{2} l_{2}$

t = eq 1 - a $\frac{α}{2}$ $\frac{α}{2} [α = 0.4]$

$K p = \frac{{(P_{H_{2}})}^{\frac{1}{2}} * {(P_{l_{2}})}^{\frac{1}{2}}}{P_{H l}} = \frac{{(0.2)}^{\frac{1}{2}} * {(0.2)}^{\frac{1}{2}}}{0.6}$

= $- 8.31 * 300 * 2.3 * l o g (\frac{1}{3}) = 2735 J / m o l$

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a year ago

Chemistry Class 12th

Given below are two statements :
Statement I: Penicillin is a bacteriostatic type antibiotic.
Statement II: The general structure of penicillin is:

Choose the correct option:

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alok kumar singh

Contributor-Level 10

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Chemistry Class 12th

Ammonium salts on heating with slaked lime liberate a colourless gas (X). Identify the incorrect statement for gas (X).

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Vishal Baghel

Contributor-Level 10

X is NH?
With mercurous nitrate it forms Hg + HgNH? Cl
Black

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Chemistry Chemistry Solutions

The osmotic pressure exerted by a solution prepared by dissolving 2.0g of protein of molar mass 60 kg mol1 in 200 mL of water at 27°C is_______Pa. (nearest integer)

(Use R = 0.083 L bar mol1 K1)

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Raj Pandey

Contributor-Level 9

$π = i * c * R * T = \frac{2 * 0.83 * 300}{60 * 1 0^{3}} = 0.00415 b a r$

= 415 Pa

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a year ago

Chemistry Coordination Compounds

Which one of the following complexes exhibits chirality?

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Vishal Baghel

Contributor-Level 10

[M (AA)? ]? complexes are chiral.

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Chemistry Ncert Solutions Chemistry Class 11th

A fish swimming in water body when taken out from the water body is covered with a film of water of weight 36g. When it is subjected to cooking at 100°C, then the internal energy for vaporization in kJ mol1 is_____________. (nearest integer)

[Assume steam to be an ideal gas. Given $Δ_{v a p} H^{Θ}$ $_{}^{}$ for water at 373K and 1 bar is 41.1 kJ mol1; R = 8.31 JK1mol1]