1
JEE Main 2025 (Online) 23rd January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I: In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds.

Statement II: The sodium fusion extract of an organic compound having N and S gives prussian blue colour with $\mathrm{FeSO}_4$ and $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$

In the light of the above statements, choose the correct answer from the options given below

A
Both Statement I and Statement II are false
B
Statement I is false but Statement II is true
C
Both Statement I and Statement II are true
D
Statement I is true but Statement II is false
2
JEE Main 2024 (Online) 9th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following compound can give positive iodoform test when treated with aqueous $$\mathrm{KOH}$$ solution followed by potassium hypoiodite.

A
JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Practical Organic Chemistry Question 10 English Option 1
B
JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Practical Organic Chemistry Question 10 English Option 2
C
JEE Main 2024 (Online) 9th April Evening Shift Chemistry - Practical Organic Chemistry Question 10 English Option 3
D
$$\mathrm{CH_3CH_2CH_2CHO}$$
3
JEE Main 2024 (Online) 9th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

LIST I
(Test)
LIST II
(Observation)
A. $$\mathrm{Br_2}$$ water test I. Yellow orange or orange red precipitate formed
B. Ceric ammonium nitrate test II. Reddish orange colour disappears
C. Ferric chloride test III. Red colour appears
D. 2, 4 - DNP test IV. Blue, Green, Violet or Red colour appear

Choose the correct answer from the options given below:

A
A-II, B-III, C-IV, D-I
B
A-III, B-IV, C-I, D-II
C
A-I, B-II, C-III, D-IV
D
A-IV, B-I, C-II, D-III
4
JEE Main 2024 (Online) 9th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Identify the incorrect statements regarding primary standard of titrimetric analysis.

(A) It should be purely available in dry form.

(B) It should not undergo chemical change in air.

(C) It should be hygroscopic and should react with another chemical instantaneously and stoichiometrically.

(D) It should be readily soluble in water.

(E) $$\mathrm{KMnO}_4$$ & $$\mathrm{NaOH}$$ can be used as primary standard.

Choose the correct answer from the options given below :

A
(C) and (E) only
B
(A) and (B) only
C
(B) and (E) only
D
(C) and (D) only
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