1
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
During the qualitative analysis of salt with cation y2+, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y2+) present respectively are :
2
JEE Main 2021 (Online) 31st August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Match List - I with List - II :
Choose the most appropriate answer from the options given below :
| List - I (Metal Ion) |
List - II (Group of Qualitative analysis) |
||
|---|---|---|---|
| (a) | $$M{n^{2 + }}$$ | (i) | Group - III |
| (b) | $$A{s^{3 + }}$$ | (ii) | Group - IIA |
| (c) | $$C{u^{2 + }}$$ | (iii) | Group - IV |
| (d) | $$A{l^{3 + }}$$ | (iv) | Group - IIB |
Choose the most appropriate answer from the options given below :
3
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
To an aqueous solution containing ions such as Al3+, Zn2+, Ca2+, Fe3+, Ni2+, Ba2+ and Cu2+ was added conc. HCl, followed by H2S.
The total number of cations precipitated during this reaction is/are :
The total number of cations precipitated during this reaction is/are :
4
JEE Main 2021 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Cu2+ salt reacts with potassium iodide to give
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