1
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The compound, which evolves carbon dioxide on treatment with aqueous solution of sodium bicarbonate at 25$$^\circ$$C, is
A
C6H5OH
B
CH3COCl
C
CH3CONH2
D
CH3COOC2H5
2
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The indicated atom is not a nucleophilic site in
A
$$\mathop B\limits_ \uparrow H_4^ - $$
B
$$\mathop C\limits_ \uparrow {H_3}Mgl$$
C
$$C{H_3}\mathop O\limits_ \uparrow H$$
D
$$C{H_3}\mathop N\limits_ \uparrow {H_2}$$
3
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The charge carried by 1 millimole of Mn+ ions is 193 coulombs. The value of n is
A
1
B
2
C
3
D
4
4
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Which of the following mixtures will have the lowest pH at 298 K?
A
10 mL 0.05 N CH3COOH + 5 mL 0.1 N NH4OH
B
5 mL 0.2 N NH4Cl + 5 mL 0.2 N NH4OH
C
5 mL 0.1 N CH3COOH + 10 mL 0.05 N CH3COONa
D
5 mL 0.1 N CH3COOH + 5 mL 0.1 N NaOH
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