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Ncert Solutions Chemistry Class 11th

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2 months ago

Ncert Solutions Chemistry Class 11th Class 11th

The reaction of NO with N?O? at 250 K gives:

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Ncert Solutions Chemistry Class 11th Class 11th

Dihydrogen of high purity ( > 99.95%) is obtained through:

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alok kumar singh

Contributor-Level 10

Dihydrogen of high degree of purity (>99.95%) is obtained by the electrolysis of warm aqueous barium hydroxide solution between nickel electrodes.

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Ncert Solutions Chemistry Class 11th Class 11th

The value of K꜀ is 64 at 800 K for the reaction
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
The value of K꜀ for the following reaction is:
NH₃(g) ⇌ ½ N₂(g) + ³⁄₂ H₂(g)

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alok kumar singh

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Ncert Solutions Chemistry Class 11th Class 11th

The average molar mass of chlorine is 35.5 g mol⁻¹. The ratio of ³⁵Cl to ³⁷Cl in naturally occurring chlorine is close to:

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alok kumar singh

Contributor-Level 10

³? Cl ³? Cl
Molar ratio x 1 – x
M? 35 * x + 37 (1 − x) = 35.5
35x + 37 – 37x = 35.5
2x = 1.5
x = 3/4
So, ratio of ³? Cl: ³? Cl = 3: 1

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Ncert Solutions Chemistry Class 11th Class 11th

For a reaction,
4M(s) + nO₂(g) → 2M₂Oₙ(s),
the free energy change is plotted as a function of temperature. The temperature below which the oxide is stable could be inferred from the plot as the point at which

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alok kumar singh

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For oxide to be stable its ΔG value should be negative.

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Ncert Solutions Chemistry Class 11th Thermodynamics

Five moles of an ideal gas at 1 bar and 298 K is expanded into vacuum to double the volume. The work done is :

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Vishal Baghel

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Pext is zero so W = zero

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Ncert Solutions Chemistry Class 11th Class 11th

An alkaline earth metal ' M' readily forms water soluble sulphate and water insoluble hydroxide. Its oxide MO is very stable to heat and does not have rock-salt structure. M is:

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