InterviewSolution
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InterviewSolution
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Which of the following statements is/are incorrect (I) Filter paper moistened with cadmium acetate and lead acetate turn black and yellow respectively, when brought in contact with `H_(2)S` gas. (II) Sulphites in presence of Zinc, reacts with dilute `H_(2)SO_(4)` to liberate `H_(2)S` gas. (III) Stability of carbonates decrease with increasing metallic character. (IV) Borax bead test is responded generally by p and d block metal salts. (V) Sodium chloride on heating with aqueous solution of `K_(2)Cr_(2)O_(7)` and concentrated `H_(2)SO_(4)` produced white fumes. |
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Answer» Correct Answer - 4(I),(III),(IV) &(V) (I) `Pb^(+2)+H_(2)S to underset("black")(PbS)darr` `Cd^(+2)+H_(2)S to underset("yellow")(CdS darr)` (II) `Zn+H_(2)SO_(4)+SO_(3)^(-) to H_(2)S uarr +Zn^(2+)` (III) Stability of carbonate `prop` metallic character (IV) Borax bead test is responded by d-block metal salt. (V) `NaCl+K_(2)Cr_(2)O_(7)+H_(2)SO_(4) to CrO_(2)Cl_(2) uarr +Cr^(3+) +SO_(4)^(2-)` |
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