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Ortho para ...

Question

Ortho & para hydrogen differ in

A

Atomic number

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B

Mass number

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C

Electron spin in two atoms

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D

Nuclear spin in two atoms

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Solution

The correct option is D Nuclear spin in two atoms
Ortho hydrogen molecules are those in which the spins of both the nuclei are in the same direction. Molecules of hydrogen in which the spins of both the nuclei are in the opposite direction are called para hydrogen.

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State True or False.

Molecular hydrogen consists of two forms, ortho- and para- hydrogen, which differ by the spins of the electrons and nuclei.

Q. Choose the correct statement with respect to ortho hydrogen:
Statement-I: In ortho hydrogen, the spin of both nuclei are in same direction.
Statement-II: Ortho hydrogen is more abundant than para hydrogen at room temperature.
Statement-III: Thermal conductivity of ortho hydrogen is more than para hydrogen.

Assertion: Ortho and para dihydrogen are nuclear spin isomers.

Reason: They have same nuclear spins.

Q. Ortho and para hydrogen differ:

Q. Ortho-nitrophenol is steam volatile whereas para-nitrophenol is not. This is due to

1.

Intramolecular hydrogen bonding present in ortho-nitrophenol

2.

Intermolecular hydrogen bonding present in para-nitrophenol

3.

Intramolecular hydrogen bonding present in para-nitrophenol

4.

Inter-molecular hydrogen bonding present in ortho-nitrophenol.

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