Objective question in Solid state

IIT JEE 2015 Tutorials › Physical Chemistry questions › Objective question in Solid state

3 metals A (270), B (80) & C (10) crystallize in simple cubic, face centered cubicÂ and body centered cubic (bcc) phases respectively with unit cell 3, 2 and 1 Ã
respectively. The densities of A:B:C are in the ratio of:
a) 3:2:1 b) 54:68:74 c) 1:1:1 d) 1:2:4

#Chemistry #Physical Chemistry #Solid state

UP 0 DOWN 0 0 1
Post on FacebookPost anonymously?

1 Answers

1

student ·2014-05-01 08:26:48

I have a doubt in this question,

according to my calculation,

we know
d = Z.M. / (a³ * N_a)
then, d_a:d_b:d_c
=(1*270/3³):(4*80/2³):(2*10/1³)[since N_a gets cancelled]
=10:40:20
=1:4:2

but this was not there in the options.
where am i going wrong?

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω