Q. 655.0( 2 Votes )
A red-brown metal X forms a salt XSO4. When hydrogen sulphide gas is passed through an aqueous solution of XSO4, then a black precipitate of XS is formed along with sulphuric acid solution.
(a) What could the salt xso4 be?
(b) What is the colour of salt XSO4?
(c) Name the black precipitate XS.
(d) By using the formula of the salt obtained in (a) above, write an equation of the reaction which takes place when hydrogen sulphide gas is passed through its aqueous solution.
(e)What type of chemical reaction takes place in this case?
(b) Colour of salt is “Blue”.
(c) Copper sulphidde is the black precipitate
(d) The chemical equation:
CuSO4 (aq.) + H2S (g) CuS (s) + H2SO4 (aq.)
(e) Double displacement reaction takes place.
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Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to:
(i) The formation of silver by decomposition of silver chloride
(ii) Sublimation of silver chloride
(iii) Decomposition of chlorine gas from silver chloride
(iv) Oxidation of silver chlorideEvergreen Science
Which of the following are exothermic processes?
(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)Evergreen Science
Write true or false for the following statements:
The reaction Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s) is type of double displacement reactionEvergreen Science