1
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Decarboxylation of all six possible forms of diaminobenzoic acids C6H3(NH2)2COOH yields three products A, B and C. Three acids give a product 'A', two acids gives a product 'B' and one acid give a product 'C'. The melting point of product 'C' is

A
63$$^\circ$$C
B
90$$^\circ$$C
C
104$$^\circ$$C
D
142$$^\circ$$C
2
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements.

Statement I : Maltose has two $$\alpha$$-D-glucose units linked at C1 and C4 and is a reducing sugar.

Statement II : Maltose has two monosaccharides : $$\alpha$$-D-glucose and $$\beta$$-D-glucose linked at C1 and C6 and it is a non-reducing sugar.

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

A
Both Statement I and Statement II are true.
B
Both Statement I and Statement II are false.
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
3
JEE Main 2022 (Online) 27th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II.

List-I
(Anion)
List-II
(gas evolved on reaction with dil.H$$_2$$SO$$_2$$)
(A) CO$${_3^{2 - }}$$ I. Colourless gas which turns lead acetate paper black.
(B) S$$^{2 - }$$ II. Colourless gas which turns acidified potassium dichromate solution green.
(C) SO$${_3^{2 - }}$$ III. Brown fumes which turns acidified KI solution containing starch blue.
(D) NO$${_2^ - }$$ IV. Colourless gas evolved with brisk effervescence, which turns lime water milky.

Choose the correct answer from the options given below :

A
A-III, B-I, C-II, D-IV
B
A-II, B-I, C-IV, D-III
C
A-IV, B-I, C-III, D-II
D
A-IV, B-I, C-II, D-III
4
JEE Main 2022 (Online) 27th June Evening Shift
Numerical
+4
-1
Change Language

116 g of a substance upon dissociation reaction, yields 7.5 g of hydrogen, 60 g of oxygen and 48.5 g of carbon. Given that the atomic masses of H, O and C are 1, 16 and 12, respectively. The data agrees with how many formulae of the following?

A. CH3COOH, B. HCHO, C. CH3OOCH3, D. CH3CHO

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