1
WB JEE 2022
MCQ (More than One Correct Answer)
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Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?

A
Benzaldehyde
B
Propiophenone
C
Acetone
D
Acetaldehyde
2
WB JEE 2022
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WB JEE 2022 Chemistry - Aromatic Chemistry Question 3 English

The above conversion can be carried out by,

A
Zn - Hg/Conc. HCl
B
i. H2NNH2 ii. NaOH in ethylene glycol, $$\Delta$$
C
i. HSCH2CH2SH/H$$ \oplus $$ ii. H2/Ni
D
Bromine water
3
WB JEE 2022
MCQ (More than One Correct Answer)
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Which of the statements are incorrect?

A
pH of a solution of salt of strong acid and weak base is less than 7.
B
pH of a solution of a weak acid and weak base is basic if Kb < Ka.
C
pH of an aqueous solution of 10$$-$$8 (M) HCl is 8.
D
Conjugate acid of NH$$_2^ - $$ is NH3.
4
WB JEE 2022
MCQ (Single Correct Answer)
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-0.25
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The values of a, b, c for which the function $$f(x) = \left\{ \matrix{ {{\sin (a + 1)x + \sin x} \over x},x < 0 \hfill \cr c,x = 0 \hfill \cr {{{{(x + b{x^2})}^{{1 \over 2}}} - {x^{{1 \over 2}}}} \over {b{x^{{1 \over 2}}}}},x > 0 \hfill \cr} \right.$$ is continuous at x = 0, are

A
$$a = {3 \over 2},b = - {3 \over 2},c = {1 \over 2}$$
B
$$a = - {3 \over 2},c = {3 \over 2},b$$ is arbitrary non-zero real number.
C
$$a = - {5 \over 2},b = - {3 \over 2},c = {3 \over 2}$$
D
$$a = - 2,b \in R - \{ 0\} ,c = 0$$
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