1
JEE Main 2018 (Online) 16th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In a complexometric titration of metal ion with ligand
M(Metal ion) + L(Ligand) $$ \to $$ C(Complex) end point is estimated spectrophoto - metrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs, then the titration plot between absorbed light (A) versus volume of ligand 'L' (V) would look like :
A
JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 86 English Option 1
B
JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 86 English Option 2
C
JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 86 English Option 3
D
JEE Main 2018 (Online) 16th April Morning Slot Chemistry - Practical Organic Chemistry Question 86 English Option 4
2
JEE Main 2018 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following compounds will be suitable for Kjeldahl’s method for nitrogen estimation?
A
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 88 English Option 1
B
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 88 English Option 2
C
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 88 English Option 3
D
JEE Main 2018 (Offline) Chemistry - Practical Organic Chemistry Question 88 English Option 4
3
JEE Main 2017 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A solution containing a group-IV cation gives a precipitate on passing H2S. A solution of this precipitate in dil.HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :
A
Co2+
B
Ni2+
C
Mn2+
D
Zn2+
4
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Sodium extract is heated with concentrated HNO3 before testing for halogens because :
A
Silver halides are totally insoluble in nitric acid.
B
Ag2S and AgCN are soluble in acidic medium.
C
S2 and CN, if present, are decomposed by conc. HNO3 and hence do not interfere in the test.
D
Ag reacts faster with halides in acidic medium.
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