1.

A chemist opened a cupboard and found four bottles containing water solutions, each of which had lost its label.Bottles 1,2,3 contanied colourless solution, while bottle 4 contained a blue solution.The labels from the bottles were lying scattered on the floor of the cupboard.They were: copper (II) sulphate, Hydrochloric acid lead nitrate , Sodium carbonate By mixing samples of the contents of the bottles, in pairs , the chemist made the following observations : Bottle 1 +Bottle 2 `to` White precipitate is formed. Bottle 1 +Bottle 3 `to` White precipitate is formed. Bottle 1 +Bottle 4 `to` White precipitate is formed. Bottle 2 +Bottle 3 `to` Colourless and odourless gas is evolved. Bottle 2 +Bottle 4 `to` No visible reaction is observed. Bottle 3 +Bottle 4 `to` Blue precipitate is formed. With the help of the above observations answer the following questions. Which of the following bottles will give white precipitate with bottle 1?A. Bottle 2B. Bottle 3C. Bottle 4D. All of these

Answer» Correct Answer - D
`Pb^(2+)+CO_3^(2-) to PbCO_3 darr` (white)
`Pb^(2+)+2Cl^(-)toPbCl_2darr`(white)
`Pb^(2+)+SO_4^(2-)toPbSO_4 darr`(white)


Discussion

No Comment Found

Related InterviewSolutions