Predicting chemical reactions

Question 6

Hard

A student investigates the reactions of solid potassium halides with concentrated sulfuric acid to predict and identify the products. With one specific halide salt, $Y$ , they record the following observations:

Steamy fumes are evolved that turn damp blue litmus paper red.
A purple vapour is produced that condenses as a dark grey solid on the sides of the test tube.
A yellow solid is deposited on the cooler walls of the reaction vessel.
A gas with a rotten-egg smell is evolved that turns lead(II) acetate paper black.

Which option correctly identifies the halide salt $Y\,$ and all the species produced specifically by the reduction of sulfuric acid?

Halide salt $Y$ : $K I$ ; reduction products of $H_2SO_4$ : $SO_2$ , $S$ , $H_2S$

Halide salt $Y$ : $K I$ ; reduction products of $H_2SO_4$ : $H I$ , $I_2$ , $SO_2$ , $S$ , $H_2S$

Halide salt $Y$ : $K B r$ ; reduction products of $H_2SO_4$ : $SO_2$ only

Halide salt $Y$ : $K B r$ ; reduction products of $H_2SO_4$ : $H B r$ , $Br_2$ , $SO_2$

Predicting chemical reactions

Question 6

Predicting chemical reactions Questions

Predicting chemical reactions

Question 6

Predicting chemical reactions Questions