Ncert Solutions Chemistry Class 11th
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The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in water is _______ ×10-5 mol dm-3. (Round off to the nearest integer).
[ Given : Henry's law constant = KH = 8.0 ×104 kPa for O2. Density of water with dissolved oxygen = 1.0kg dm-3]
The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in water is _______ ×10-5 mol dm-3. (Round off to the nearest integer).
[ Given : Henry's law constant = KH = 8.0 ×104 kPa for O2. Density of water with dissolved oxygen = 1.0kg dm-3]
Partial Pressure of O? = K? * solubility (K? = Henry's constant)
Solubility = PO? / K? = 20 / (8.0 × 10? ) = 2.5 × 10? = 25 × 10? M
Ans = 25
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The correct order of conductivity of ions in water is:
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The correct order of conductivity of ions in water is:
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In an aqueous medium, all alkali metal cations are converted into their hydrated form. More intensely positive cations have more hydration, and hence the size of the cation increases after hydration. Therefore, the Li? cation has a larger size in hydrated form and the least conductivity. The order o
Upvote The INCORRECT statement(s) about heavy water is (are)
(A) used as a moderator in nuclear reactor
(B) obtained as by-product in fertilizer industry
(C) used for the study of reaction mechanism
(D) has a higher dielectric constant than water
Choose the correct answer from the options given below:
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The INCORRECT statement(s) about heavy water is (are)
(A) used as a moderator in nuclear reactor
(B) obtained as by-product in fertilizer industry
(C) used for the study of reaction mechanism
(D) has a higher dielectric constant than water
Choose the correct answer from the options given below:
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Except for option (D), all are the important characteristics of D? O. D? O is useful for the isotopic leveling effect in reaction mechanisms. The dielectric constants of H? O and D? O are respectively 80 and 60.
Upvote The condition that indicates a polluted environment is:
The condition that indicates a polluted environment is:
Excess of nitrogen and phosphorus is primarily responsible for eutrophication and hence an indicator of polluted environment.
Upvote The equation that represents the water - gas shift reactions is:
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The equation that represents the water - gas shift reactions is:
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In water gas shift reaction carbon monoxide is oxidized into carbon dioxide by treating it with steam in presence of catalyst.
Upvote Reaction of an inorganic sulphite X with dilute H₂SO₄ generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and Z respectively, are:
Reaction of an inorganic sulphite X with dilute H₂SO₄ generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and Z respectively, are:
Na? SO? + H? SO? → SO? + Na? SO? + H? O
SO? + 2NaOH → Na? SO? + H? O
Na? SO? + SO? + H? O → 2NaHSO?
Upvote Dihydrogen of high purity ( > 99.95%) is obtained through:
Dihydrogen of high purity ( > 99.95%) is obtained through:
Dihydrogen of high degree of purity (>99.95%) is obtained by the electrolysis of warm aqueous barium hydroxide solution between nickel electrodes.
Upvote 
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:
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:
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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