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Directive Influence of Substituents

State True or...

Question

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

A

True

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B

False

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Solution

The correct option is A True
There exist two different spin isomers of hydrogen diatomic molecules that differ by the relative spin of their nuclei. In orthohydrogen form the spins are parallel while in parahydrogen form the spins are anti parallel.

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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.

Q. H-F forms hydrogen bonding - True or False?

Q. State True or False.
The phenomenon by which an element exists in two or more different crystalline or amorphous form is called allotropy.

Q. Mark the following statements as true or false
(i) Ordinary hydrogen is a mixture of

75

25

% para- forms
(ii) All the four atoms of moleculle of

H_{2} O_{2}

lie in the same plane.
(iii) Hydrogen peroxide is neutral like water.
(iv)

H_{2} O_{2}

can be prepared from

B a O_{2}

M n O_{2}

P b O_{2}

State True or False:

A hydrogen bomb is based on the principle of nuclear fusion.

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Directive Influence of Substituents

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