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1
JEE Main 2021 (Online) 17th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Nitrogen can be estimated by Kjeldahl's method for which of the following compound?
A
JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Practical Organic Chemistry Question 23 English Option 1
B
JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Practical Organic Chemistry Question 23 English Option 2
C
JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Practical Organic Chemistry Question 23 English Option 3
D
JEE Main 2021 (Online) 17th March Evening Shift Chemistry - Practical Organic Chemistry Question 23 English Option 4
2
JEE Main 2021 (Online) 17th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Given below are two statements :

Statement I : Retardation factor (Rf) can be measured in meter/centimeter.

Statement II : Rf value of a compound remains constant in all solvents.

Choose the most appropriate answer from the options given below :
A
Statement I is true but statement II is false
B
Statement I is false but statement II is true
C
Both statement I and statement II are true
D
Both statement I and statement II are false
3
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
In chromotography technique, the purification of compound is independent of :
A
Solubility of the compound
B
Mobility or flow of solvent system
C
Physical state of the pure compound
D
Length of the column or TLC plate
4
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respectively are :
A
X = SO2, Y = Cr2O3
B
X = SO3, Y = Cr2(SO4)3
C
X = SO3, Y = Cr2O3
D
X = SO2, Y = Cr2(SO4)3
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