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Define masking agents and demasking in analytical chemistry?

Important Questions on Introduction to analytical chemistry

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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
A boy measured the area of a rectangle plot to be 468 cm2. But the actual area of the plot has been recorded as 470 cm2. Calculate the percent error of his measurement. [Write the answer up to two decimal places and in %.]
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Which are likely to be reduced when an experiment is repeated a number of times?
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry

Define Analytical chemistry. Why is accurate measurement crucial in science?

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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
There are a certain number of students in a class. This is approximated to the nearest hundreds. Approximate value is 600 and absolute error is 25. If exact value is less than approximated value, then find the relative error. (Correct to two decimal places)
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Analytical chemistry plays an enormous role in our society.
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Mention the uses of graph in chemical analysis.
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
A boy measured the area of a rectangle plot to be 450 cm2. But the actual area of the plot has been recorded as 454 cm2. Calculate the percent error of his measurement. [Write the answer up to two decimal places and in %.]
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Describe the importance of analytical chemistry in our life.
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry

In an experiment, sodium chloride is dissolved in water at different temperatures, and the maximum amounts of sodium chloride dissolved in water as a function of temperature are tabulated in the given table. Represent the experimental results using a graph.

Trial number Temperature °C Solubility ( g NaCl/100 g water)
1 0.00 35.2
2 20.0 36.1
3 40.0 37.0
4 60.0 37.7
5 80.0 38.4
6 100.0 39.0

 

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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
There are a certain number of students in a class. This is approximated to the nearest hundreds. Approximate value is 600 and absolute error is 25. If exact value is more than approximated value, then find the relative error. (Correct to two decimal places)
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Explain the importance of analytical chemistry in the field of medicine.
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
What are dependent and independent variables in a graph used for chemical analysis?
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Find the absolute and relative errors. The actual value is 252.14 mm and the measured value is 250.02 mm
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry

When two properties of a system are mathematically related to each other, the relation can be deduced by

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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Which experimental procedure is most likely to lead to a large systematic error?
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Cotyledons are also called-
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Match the following:
 
i. Biological systems a. EDTA
ii. Analytical chemistry b. cis-platin
iii. Medicinal chemistry c. Haemoglobin
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
Brief about the construction of a graph used in chemical analysis.
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Chemistry>Analytical Chemistry>Introduction to analytical chemistry>Introduction to Analytical Chemistry
There are 25425 people in a town. This is approximated to the nearest thousands. Calculate the relative error. (Correct to two decimal places)