1
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements :

Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.

Statement II : If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give NaCN and Na2S.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Both Statement I and Statement II are correct.
B
Both Statement I and Statement II are incorrect.
C
Statement I is correct but Statement II is incorrect.
D
Statement I is incorrect but Statement II is correct.
2
JEE Main 2022 (Online) 25th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

During halogen test, sodium fusion extract is boiled with concentrated HNO3 to

A
remove unreacted sodium
B
decompose cyanide or sulphide of sodium
C
extract halogen from organic compound
D
maintain the pH of extract.
3
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

A
Cu2+
B
Sr2+
C
Ba2+
D
Ca2+
4
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

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+
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