NEET UG CHEMISTRY MCQ: STATES OF MATTER

1 Hard

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Application +4 | -1

Iron crystallises in a bcc system with a lattice parameter of 2.861 Å. Calculate the density of iron in the bcc system (atomic weight of

{Fe}=56, N_A=6.02 \times 10^{23} \mathrm{~mol}^{-1}

)

View answer and explanation

Correct option: A

7.94 \mathrm{~g} \mathrm{~mL}^{-1}

Option A (

7.94 \mathrm{~g} \mathrm{~mL}^{-1}

) is correct because it is the density calculated using the bcc structure formula with the given lattice parameter and atomic weight.

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\begin{array}{cccccccccccccccccccc} {\underline {{\text{Gas}}} }&{\underline {\,{\text{Critical}}\,\,{\text{temperature}}} } \\ {\text{A}}&{{T_{{C_1}}}} \\ {\text{B}}&{{T_{{C_2}}}} \\ {\text{C}}&{{T_{{C_3}}}} \\ {\text{D}}&{{T_{{C_4}}}} \end{array}

{T_{{C_1}}} > {T_{{C_2}}} > {T_{{C_3}}} > {T_{{C_4}}}

{r^x}

r

x