When \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is heated with conc. \( \mathrm{H}_{2} ...

Channel:
PW Solutions
Subscribers:
447,000
Published on ● Video Link: https://www.youtube.com/watch?v=HZeubtJVPv4


Duration: 2:05
0 views
0

When \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is heated with conc. \( \mathrm{H}_{2} \mathrm{SO}_{4} \) and soluble chloride such as \( \mathrm{KCl} \) :
(a) Red vapours of \( \mathrm{CrO}_{2} \mathrm{Cl}_{2} \) are evolved.
(b) \( \mathrm{Cl}^{-} \)ion is oxidized to \( \mathrm{Cl}_{2} \) gas.
(c) \( \mathrm{CrCl}_{3} \) is formed
(d) \( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \) ion is reduced to green \( \mathrm{Cr}^{3+} \) ion.
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-06-09In II B group of basic radicals the yellow ppt. are given by: (a) \( \mathrm{As}^{3+} \) (b) \( ...
2023-06-09Which of the following statements is/are correct? (a) A filter paper moistened with cadmium acet...
2023-06-09Which of the following radical can not be confirmed by using dil.HCl? (a) \( \mathrm{S}^{2-} \) ...
2023-06-09A mixture is known to contain \( \mathrm{NO}_{3}^{-} \)and \( \mathrm{NO}_{2}^{-} \). Before per...
2023-06-09\( \mathrm{NaCl}, \mathrm{NaBr}, \mathrm{NaI} \) mixture on adding conc. \( \mathrm{H}_{2} \math...
2023-06-09What are the products formed when an aqueous solution of magnesium bicarbonate is boiled? (a) \(...
2023-06-09\( \mathrm{NaX} \) (Sodium salt of particular anion \( \mathrm{X} \) ) gives brisk effervescenc...
2023-06-09Which of the following pairs comprise the red precipitates? (a) \( \mathrm{Ag}_{2} \mathrm{CrO}_...
2023-06-09A white solid imparts a violet colour to a Bunsen flame. On being heated with concentrated \( \m...
2023-06-09Which of the following halide is soluble in water? (a) \( \mathrm{AgF} \) (b) \( \mathrm{AgCl} \...
2023-06-09When \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is heated with conc. \( \mathrm{H}_{2} ...
2023-06-09\( \mathrm{KBr} \), on reaction with conc. \( \mathrm{H}_{2} \mathrm{SO}_{4} \), gives reddish-b...
2023-06-09With \( \mathrm{Cr}_{2} \mathrm{O}_{3} \), colour of the bead in sodium carbonate bead test is: ...
2023-06-09Which metal gives violet colour in oxidising flame when heated with borax? (a) \( \mathrm{Fe} \)...
2023-06-09Aqueous solution of a salt \( +\mathrm{MgSO}_{4} \) solution \( \longrightarrow \) no precipitat...
2023-06-09An inorganic salt when heated evolves coloured gas which bleaches moist litmus paper. The evolve...
2023-06-09Which of the following salt will evolve sulphur dioxide gas along with formation of yellowish tu...
2023-06-09When \( \mathrm{Ag} \) reacts with conc. \( \mathrm{HCl} \), then products will be: (a) \( \math...
2023-06-09In the test for iodine, \( \mathrm{I}_{2} \) is treated with sodium thiosulphate \( \left(\mathr...
2023-06-09A colourless gas is dissolved in water and the resulting solution turns red litmus blue ; the ga...
2023-06-09A substance on treatment with dilute \( \mathrm{H}_{2} \mathrm{SO}_{4} \) liberates a colourless...