Choose the correct statement (s) for hyd...

Choose the correct statement (s) for hydrogen and deuterium atoms (considering the motion of nucleus)

The radius of first Bohr orbit of deuterlum is less than that of hydrogen

The speed of electron in first Balmer line of deuterlum is more than than that of hydrogen

The wavelength of first Balmer line of deuterium is more than that of hydrogen

The angular momentum of electron in the first Bohr orbit of deuterium is more than that of hydrogen

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The correct Answer is:

We have `r prop (1)/(mu) , mu = "reduced mass"`
`(Kq^(2))/(r)= (mv_(e)^(2))/(r_(e)) = (mv_(N)^(2))/(r_(N)) , mv_(e)r_(e) = (nh)/(2pi)`

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Choose the correct statement for calciferol.

It is synthesized by microorganism in intestine.

It is synthesized in skin with the help of sunlight.

It cannot be synthesized in human body.

Human body synthesize it from carotene.

Dioecious organisms are seen only in animals.

Dioecuous organisms are seen only in plants

Dioecious organisms are seen in both plants and animals.

Dioecious organisms are seen only in vertebrates.

Frenkel defect in usually favoured by a very small difference in the sizes of cation and anion.

Frenkel efect is a disocation defect.

Trapping of an electron in the lattice leads to the formation of F - center

Schottky defects have no effect on the physical properties of solids.