1
JEE Advanced 2025 Paper 1 Online
MCQ (Single Correct Answer)
+3
-1
Change Language

Consider the depicted hydrogen (H) in the hydrocarbons given below. The most acidic hydrogen (H) is

A
JEE Advanced 2025 Paper 1 Online Chemistry - Hydrocarbons Question 1 English Option 1
B
JEE Advanced 2025 Paper 1 Online Chemistry - Hydrocarbons Question 1 English Option 2
C
JEE Advanced 2025 Paper 1 Online Chemistry - Hydrocarbons Question 1 English Option 3
D
JEE Advanced 2025 Paper 1 Online Chemistry - Hydrocarbons Question 1 English Option 4
2
JEE Advanced 2025 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

Regarding the molecular orbital (MO) energy levels for homonuclear diatomic molecules, the INCORRECT statement(s) is(are)

A

Bond order of Ne2 is zero.

B

The highest occupied molecular orbital (HOMO) of F2 is $\sigma$-type.

C

Bond energy of $O_2^{+}$ is smaller than the bond energy of O2.

D

Bond length of Li2 is larger than the bond length of B2.

3
JEE Advanced 2025 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

The pair(s) of diamagnetic ions is(are)

A

La3+, Ce4+

B

Yb2+, Lu3+

C

La2+, Ce3+

D

Yb3+, Lu2+

4
JEE Advanced 2025 Paper 1 Online
MCQ (More than One Correct Answer)
+4
-2
Change Language

For the reaction sequence given below, the correct statement(s) is(are)

JEE Advanced 2025 Paper 1 Online Chemistry - Haloalkanes and Haloarenes Question 1 English

(In the options, X is any atom other than carbon and hydrogen, and it is different in P, Q and R)

A

C–X bond length in P, Q and R follows the order Q > R > P.

B

C–X bond enthalpy in P, Q and R follows the order R > P > Q.

C

Relative reactivity toward SN2 reaction in P, Q and R follows the order P > R > Q.

D

pKa value of the conjugate acids of the leaving groups in P, Q and R follows the order R > Q > P.

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