1
WB JEE 2020
MCQ (Single Correct Answer)
+2
-0.5
Change Language
A homonuclear diatomic gas molecule shows 2-electron magnetic moment. The one-electron and two-electron reduced species obtained from above gas molecule can act as both oxidising and reducing agents. When the gas molecule is one-electron oxidised the bond length decreases compared to the neutral molecule. The gas molecule is
A
N2
B
Cl2
C
O2
D
B2
2
WB JEE 2020
MCQ (Single Correct Answer)
+2
-0.5
Change Language
$$C{H_3} - O - C{H_2} - Cl\mathrel{\mathop{\kern0pt\longrightarrow} \limits_\Delta ^{aq{.^\Theta }OH}} C{H_3} - O - C{H_2} - OH$$

Which information below regarding this reaction is applicable?
A
It follows SN2 pathway, because it is a primary alkyl chloride
B
It follows SN1 pathway, because the intermediate carbocation is resonance stabilised
C
SN1 pathway is not followed, because the intermediate carbocation is destabilised by -/-effect of oxygen
D
A mixed SN1 and SN2 pathway is followed
3
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
Which of the following reactions give(s) a meso-compound as the main product?
A
WB JEE 2020 Chemistry - Hydrocarbons Question 9 English Option 1
B
WB JEE 2020 Chemistry - Hydrocarbons Question 9 English Option 2
C
WB JEE 2020 Chemistry - Hydrocarbons Question 9 English Option 3
D
WB JEE 2020 Chemistry - Hydrocarbons Question 9 English Option 4
4
WB JEE 2020
MCQ (More than One Correct Answer)
+2
-0
Change Language
For spontaneous polymerisation, which of the following is (are) correct?
A
$$\Delta $$G is negative
B
$$\Delta $$H is negative
C
$$\Delta $$S is positive
D
$$\Delta $$S is negative
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