MCQ
What is the name of element with atomic number $105$
- AKurchatovium
- ✓Dubnium
- CNobelium
- DHolmium
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(Molal depression constant for water is $1.80\, K\, kg\,mol ^{-1}$ and molar mass of $KCl$ is $74.6 \,g\, mol ^{-1}$ )

