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Ammonium chloride crystallizes in a body...

Ammonium chloride crystallizes in a body-centred cubic lattice with a unit distance of 387 pm. If the size of `Cl^(-)` ion is 181pm, the size of `NH_(4)^(+)` ion would be

A

206 pm

B

116 pm

C

174 pm

D

154 pm

Text Solution

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The correct Answer is:
D
body diagona of cube ` = sqrt3a`
` = 1.732 xx 387 = 670.3 ` pm
`(r_c + r_a) = a = 670.3`
` r_c = (670.3)/(2) - 181 = 154 ` pm
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  14. Copper crystallises in fcc with a unit cell length of 361 pm. What is ...

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  15. The edge length of a face centred cubic cell of an ionic substance is ...

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  16. Lithium forms body centred cubic structure. The length of the side of ...

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  17. CsClcrystallizes in body centred cubic lattice. If 'a' is its edge len...

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