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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 :

A
Dimethylglyoxime and Ni2+
B
Dimethylglyoxime and Co2+
C
Nessler's reagent and Hg2+
D
Nessler's reagent and Ni2+
2
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 :
A
1
B
3
C
4
D
2
3
JEE Main 2021 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Cu2+ salt reacts with potassium iodide to give
A
Cu2I2
B
Cu2I3
C
Cul
D
Cu(I3)2
4
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Given below are two statements :

Statement I : The identification of Ni2+ is carried out by dimethyl glyoxime in the presence of NH4OH.

Statement II : The dimethyl glyoxime is a bidentate neutral ligand.

In the light of the above statements, choose the correct answer from the options given below :
A
Statement I is false but Statement II is true.
B
Statement I is true but Statement II is false.
C
Both Statement I and Statement II are false.
D
Both Statement I and Statement II are true.
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