A mixture is known to contain \( \mathrm{NO}_{3}^{-} \)and \( \mathrm{NO}_{2}^{-} \). Before per...

Channel:
PW Solutions
Subscribers:
445,000
Published on ● Video Link: https://www.youtube.com/watch?v=RtfxXTxjHJ4


Duration: 3:05
2 views
0

A mixture is known to contain \( \mathrm{NO}_{3}^{-} \)and \( \mathrm{NO}_{2}^{-} \). Before performing ring test for \( \mathrm{NO}_{3}^{-} \), the aqueous solution should be made free of \( \mathrm{NO}_{2}^{-} \). This is done by heating aqueous extract with:
(a) Conc. \( \mathrm{HNO}_{3} \)
(b) dil. \( \mathrm{HNO}_{3} \)
(c) Urea
(d) Zinc dust
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2023-06-09\( \mathrm{K}_{2} \mathrm{CrO}_{4} \) is used for identification of following cations: (a) \( \m...
2023-06-09Which of the following anion(s) is/are easily removed from aqueous solution by precipitation? (a...
2023-06-09Reddish brown gas is obtained when the following is/are treated with conc. \( \mathrm{H}_{2} \ma...
2023-06-09\( \mathrm{NH}_{4} \mathrm{OH} \) dissolves which of the following completely or partially? (a) ...
2023-06-09Borax bead test is/are given by: (a) \( \mathrm{Co}^{2+} \) (b) \( \mathrm{Zn}^{2+} \) (c) \( \m...
2023-06-09Which of the following combinations will give yellowish precipitate in an aqueous medium? (a) \(...
2023-06-09Conc. \( \mathrm{H}_{2} \mathrm{SO}_{4} \) will not give any gas with: (a) \( \mathrm{ZnSO}_{4} ...
2023-06-09Which of the following statements is/are correct? (a) A filter paper moistened with cadmium acet...
2023-06-09When borax is heated it forms a colourless glassy bead because formation of: (a) \( \mathrm{B}_{...
2023-06-09\( \mathrm{NaX} \) (Sodium salt of particular anion \( \mathrm{X} \) ) gives brisk effervescenc...
2023-06-09A mixture is known to contain \( \mathrm{NO}_{3}^{-} \)and \( \mathrm{NO}_{2}^{-} \). Before per...
2023-06-09A hydrated compound (a) is greenish crystalline salt, which gave the followig reactions; (i) Add...
2023-06-09Which of the following gives volatile gases with dil. \( \mathrm{H}_{2} \mathrm{SO}_{4} \) ? (a)...
2023-06-09Heating which of the following salts in a dry test tube may cause a change in their colour? (a) ...
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 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...
2023-06-09\( \mathrm{NaCl}, \mathrm{NaBr}, \mathrm{NaI} \) 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) \(...
2023-06-09In the test for iodine, \( \mathrm{I}_{2} \) is treated with sodium thiosulphate \( \left(\mathr...
2023-06-09Which of the following radical can not be confirmed by using dil.HCl? (a) \( \mathrm{S}^{2-} \) ...