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1
JEE Main 2024 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
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A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

A
dimethyl glyoxime
B
sodium nitroprusside
C
meta-dinitrobenzene
D
neutral $$\mathrm{FeCl}_3$$
2
JEE Main 2024 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Match List I with List II

List - I
(Substances)		 List - II
(Element Present)
(A) Ziegler catalyst (I) Rhodium
(B) Blood Pigment (II) Cobalt
(C) Wilkinson catalyst (III) Iron
(D) Vitamin $$\mathrm{B_{12}}$$ (IV) Titanium

Choose the correct answer from the options given below:

A
A-IV, B-III, C-I, D-II
B
A-II, B-IV, C-I, D-III
C
A-III, B-II, C-IV, D-I
D
A-II, B-III, C-IV, D-I
3
JEE Main 2024 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In which one of the following metal carbonyls, $$\mathrm{CO}$$ forms a bridge between metal atoms?

A
$$\left[\mathrm{Os}_3(\mathrm{CO})_{12}\right]$$
B
$$\left[\mathrm{Ru}_3(\mathrm{CO})_{12}\right]$$
C
$$\left[\mathrm{Mn}_2(\mathrm{CO})_{10}\right]$$
D
$$\left[\mathrm{Co}_2(\mathrm{CO})_8\right]$$
4
JEE Main 2024 (Online) 27th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identity the incorrect pair from the following :

A
Haber process - Iron
B
Polythene preparation - $$\mathrm{TiCl}_4, \mathrm{Al}\left(\mathrm{CH}_3\right)_3$$
C
Photography - AgBr
D
Wacker process - $$\mathrm{Pt} \mathrm{Cl}_2$$
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