Question

A sample of protein was analysed for me metal content and analysed for metal cotent and analysis revealed that it contained magnesium and titanium in equal amount by mass. If these are the only metallic species present in the protein and contains $0.016\%$ metal, the minimum possible molar mass of the protein is $[Mg=24,Ti=48]$

• A. $6,00,000$
• B. $1,50,000$
• C. $3,00,000$
• D. $12,00,000$

Answer 1

Answer: (A)

$6,00,000$

$100gm$ protein $\to 0.016gm$ metal

as $Mg$ & $Ti$ present in equal mass

$Mg=24\times 2Ti=48$

$=48$

$Mg+Ti=48+48=96$

$100gm$ protein $=0.016gm$ metal

$xgm$ protein $\to 96gm$ metal

$x\times 0.016=96\times 100$

$x=\frac{96\times 100}{0.016}$

$=6,00,000$
Option A is correct.