Home
Class 10
CHEMISTRY
Give suitable reasons for the following ...

Give suitable reasons for the following statements:
(i) Rain water conducts electricity but distilled water does not.
(ii) We feel burning sensation in the stomach when we over seat.
(iii) A tarnished copper vessels regain its shine when rubbed with lemon.
(iv) The crystals of washing soda change to white powder on exposure to air.

Text Solution

Verified by Experts

(i) Distilled water does not conduct electricity because it does not contain any ionic compound like acids, bases or salts dissolved in it.
(ii) When we over eat, excess of acid is produced in the stomach which causes burning sensation.
(iii) Copper vessels tarnish due to formation of basic copper carbonate which gets neutralized when rubbed with lemon and the copper vessels regains its shine.
(iv) Washing soda is sodium carbonate decahydrate which when exposed to air loses 10 molecules of water and changes to white powder.
Promotional Banner

Topper's Solved these Questions

  • ACIDS,BASES AND SALTS

    OSWAAL PUBLICATION|Exercise NCERT CORNER INTEXT QUESTIONS|19 Videos

  • ACIDS,BASES AND SALTS

    OSWAAL PUBLICATION|Exercise NCERT CORNER TEXTBOOK EXERCISES|15 Videos

  • ACIDS,BASES AND SALTS

    OSWAAL PUBLICATION|Exercise Topic-2 SHORT ANSWER TYPE QUESTION -II|17 Videos

  • CARBON AND ITS COMPOUNDS

    OSWAAL PUBLICATION|Exercise NCERT Corner (Textbook Exercises)|15 Videos

Similar Questions

Explore conceptually related problems

Write balanced chemical equations for the following statements : (i) Bleaching powder is kept open in air . (ii) Blue crystals of copper sulphate are heated. (iii) Chlorine gas is passed through dry slaked lime. (iv) Carbon dioxide gas is passed through lime water .

Give reason : (i) Ionic compounds in solid state do not conduct electricity, whereas in molten state are good conductors of electricity. (ii) Silver articles when exposed to air gradually turn blackish. (iii) Chemical reaction does not take place when copper is added to iron sulphate solution.

(i) A local magician was showing magic in a village street. He took egg shell and poured a solution over it. As a result, effervescences were formed. When he took a burning matchstick over it, it went off. (a) Identify the solution poured and the substance present in eff shell. (b) What is the reason behind effervescences? ( c) Write its balanced chemical equation. (d) Give the common name of the substance present in the egg shell. (ii) Draw a labelled diagram to show that acid solution in water conducts electricity.