SATHEE: Some Basic Concepts of Chemistry

Some Basic Concepts of Chemistry - Result Question 38

####38. The percentage weight of $Z n$ in white vitriol $[Z n S O_{4} \cdot 7 H_{2} O]$ is approximately equal to ( $Z n = 65, S = 32, O = 16$ and $H = 1$ )

(a) $33.65$

(b) $32.56$

(d) $22.65$

[1995]

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Solution:

(d) Molecular weight of $Z n S O_{4} \cdot 7 H_{2} O$ $= 65 + 32 + (4 \times 16) + 7 (2 \times 1 + 16) = 287$ .

$∴$ percentage mass of zinc $(Z n)$

$= \frac{65}{287} \times 100 = 22.65$

Some Basic Concepts of Chemistry - Result Question 38

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Some Basic Concepts of Chemistry - Result Question 38

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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