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Rohini, Delhi Details verified of Neha S.✕
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Delhi university 2010
Master of Science (M.Sc.)
Rohini, Delhi, India - 110042
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Class Location
Online class via Zoom
Student's Home
Tutor's Home
Years of Experience in Class 12 Tuition
8
Board
CBSE
Subjects taught
Chemistry
Taught in School or College
No
Class Location
Online class via Zoom
Student's Home
Tutor's Home
Years of Experience in Class 10 Tuition
9
Board
CBSE
Subjects taught
Science
Taught in School or College
No
Class Location
Online class via Zoom
Student's Home
Tutor's Home
Years of Experience in Class 11 Tuition
8
Board
CBSE
Subjects taught
Chemistry
Taught in School or College
No
Answered on 08/10/2019 Learn CBSE - Class 11/Chemistry/The s-Block Elements/NCERT Solutions/Exercise 10
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Ans (a)Sodium carbonate is a salt of a strong base and a weak acid. When dissolved in water, since carbonic acid is weak, it has a low pKa. This makes the H3O+ from water to be removed from the solution to form HCO3-, leaving an excess of OH- in the solution, thus making the solution alkaline.
Ans (b) Alkali metals cannot be obtained by the electrolysis of the aqueous solution of their salts because H2 is liberated at cathode instead of alkali metal. That’s why alkali metals are prepared by electrolysis of their fused chloride.
Ans(c)Sodium is used in seasoning the meats and is a part of the human diet.
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Class Location
Online class via Zoom
Student's Home
Tutor's Home
Years of Experience in Class 12 Tuition
8
Board
CBSE
Subjects taught
Chemistry
Taught in School or College
No
Class Location
Online class via Zoom
Student's Home
Tutor's Home
Years of Experience in Class 10 Tuition
9
Board
CBSE
Subjects taught
Science
Taught in School or College
No
Class Location
Online class via Zoom
Student's Home
Tutor's Home
Years of Experience in Class 11 Tuition
8
Board
CBSE
Subjects taught
Chemistry
Taught in School or College
No
Answered on 08/10/2019 Learn CBSE - Class 11/Chemistry/The s-Block Elements/NCERT Solutions/Exercise 10
Ask a Question
Post a Lesson
Ans (a)Sodium carbonate is a salt of a strong base and a weak acid. When dissolved in water, since carbonic acid is weak, it has a low pKa. This makes the H3O+ from water to be removed from the solution to form HCO3-, leaving an excess of OH- in the solution, thus making the solution alkaline.
Ans (b) Alkali metals cannot be obtained by the electrolysis of the aqueous solution of their salts because H2 is liberated at cathode instead of alkali metal. That’s why alkali metals are prepared by electrolysis of their fused chloride.
Ans(c)Sodium is used in seasoning the meats and is a part of the human diet.
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