By dissolving 5 g substance in 50 g of water, the decrease in freezing point is `1.2^(@)C` . The gram molal depression is `1.85^(@)C` . The molecular

Question

By dissolving 5 g substance in 50 g of water, the decrease in freezing point is `1.2^(@)C` . The gram molal depression is `1.85^(@)C` . The molecular

By dissolving 5 g substance in 50 g of water, the decrease in freezing point is `1.2^(@)C` . The gram molal depression is `1.85^(@)C` . The molecular weight of substance is
A. `105.4`
B. `118.2`
C. `137.2`
D. `154.2`

Monjur Alahi

9 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
We know that
`m=(1000K_(f)xxW_(B))/(DeltaT_(f)xxW_(A))`
`:.m=(1000xx1.85xx5)/(1.2xx50)=154.2`

9 views Answered 2023-02-05 15:29