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Q.

Match the densities of 13 th group elements from the following data

ElementDensity at 298K (g cm-3)
P11.85
Q2.35
X5.9
Y2.7

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a

X = B and Y = Ga

b

Q = Tl and Y = B

c

P = B and Q = Tl

d

P = Tl and Q = B

answer is C.

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Detailed Solution

Increasing order of density of 13 th group elements is 

B < Al < Ga < In < Tl

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