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Standard XI
Chemistry
Introduction
If the molar ...
Question

If the molar conductance of M10 solution of a weak monobasic acid is 6 S cm2 mol–1 and at infinite dilution is 480 S cm2 mol–1 then the dissociation constant of the acid will be

यदि एक दुर्बल एकक क्षारकीय अम्ल के M10 विलयन का मोलर चालकत्व 6 S cm2 mol–1 है तथा अनन्त तनुता पर यह 480 S cm2 mol–1 है, तो अम्ल का वियोजन नियतांक होगा

A
1.25 × 10–4
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B
1.56 × 10–5
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C
1.25 × 10–6
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D
7.25 × 10–6
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Solution

The correct option is B 1.56 × 10–5
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Q. The molar conductance of a weak acid at infinite dilution is 400 × 10–4 Sm2 mol–1 and the ionization constant (Ka) is 2 × 10–5. If the cell constant is 0.02 m–1, then what is the conductance of 2 × 10–3 M acid solution?

अनन्त तनुता पर एक दुर्बल अम्ल का मोलर चालकत्व 400 × 10–4 Sm2 mol–1 तथा आयनन नियतांक (Ka) 2 × 10–5 है। यदि सेल नियतांक 0.02 m–1 है, तो 2 × 10–3 M अम्ल विलयन का चालकत्व क्या है?

Q. The degree of dissociation of 2.5 × 10–2 M methanoic acid solution having molar conductivity 46.1 S cm2 mol–1 will be (Given : λ°(H+) = 349.6 S cm2 mol–1 and λ°(HCOO–) = 54.6 S cm2 mol–1)

मोलर चालकता 46.1 S cm2 mol–1 वाले 2.5 × 10–2 M मेथनॉइक अम्ल विलयन के वियोजन की मात्रा होगी (दिया है: λ°(H+) = 349.6 S cm2 mol–1 तथा λ°(HCOO–) = 54.6 S cm2 mol–1)
Q. If conductivity of 0.2 M NaCl solution is 0.015 S cm–1, then the molar conductivity of the solution in S cm2 mol–1 will be

यदि 0.2 M NaCl विलयन की चालकता 0.015 S cm–1 है, तो विलयन की मोलर चालकता S cm2 mol–1 में होगी
Q. Given the following molar conductivity at infinite dilution and 25oC
HCl: ∧∞m = 426.2 S cm2 mol−1 KCl: ∧∞m = 114.42 S cm2 mol−1 CH3COOK: ∧∞m = 149.86 S cm2 mol−1
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