30 Questions
What ancient Indian text describes the production of salt from sea?
Kautilya’s Arthashastra
Which ancient Indian work mentions the preparation of sulphuric acid, nitric acid, and various metal oxides and carbonates?
Charaka Samhita
Who was the Indian scientist known for his work in chemistry, alchemy, and metallurgy?
Nagarjuna
What did the Rasopanishada describe the preparation of?
Gunpowder mixture
According to Sushruta Samhita, what was emphasized as important?
Alkalies
Which book, appearing around 800 CE, deals with the formulation of mercury compounds?
Rsarnavam
What is the name of the governmental treaty organization created by a diplomatic treaty known as Metre Convention?
The International System of Units (SI)
Which laboratory in New Delhi is responsible for establishing experiments to realize base units and derived units of measurement in India?
National Physical Laboratory (NPL)
In which year was the establishment of a common standard system discussed and agreed upon by the scientific community?
1960
What was the purpose of the Metre Treaty signed in 1875 by member nations?
To agree to change the formal definition of a unit when its measurement accuracy improved substantially
What is the responsibility of National Metrology Institutes (NMIs) in modern industrialized countries like India?
Maintaining standards of measurements
Which country originated the metric system in the late eighteenth century?
France
What is the molecular formula of ethanol?
C2H5OH
What is the mass percentage of carbon in ethanol?
52.14%
In a 100g sample of the compound, how much chlorine is present?
71.65g
What is the ratio of hydrogen to carbon to chlorine in the compound?
2:1:1
How many moles of carbon are present in the compound?
2.021 moles
What is the molar mass of ethanol?
46.068 g
How is uncertainty in an experimental or calculated value indicated?
By mentioning the number of significant figures.
In the measurement 11.2 mL, which digit is certain and which one is uncertain?
11 is certain, and 2 is uncertain.
According to the rules for determining significant figures, are zeros preceding the first non-zero digit significant?
No, they are not significant.
How many significant figures are in the measurement 0.0052 mL?
Two significant figures.
Are zeros at the end or right of a number significant?
Yes, if they are on the right side of the decimal point.
How many significant figures are in the measurement 2.005 cm?
Four significant figures.
What is the molarity of the solution given that the mass of NaCl in 1 L solution is 175.5 g?
3 mol L^-1
What is the mass of water in the solution if the total mass of the 1 L solution is 1250 g?
1074.5 g
Define molality and provide the formula to calculate it.
Molality is the number of moles of solute present in 1 kg of solvent. Molality (m) = No. of moles of solute / Mass of solvent in kg.
What is the molality of the solution if it contains 3 moles of solute in 1.0745 kg of solvent?
2.79 m
What is a stock solution and how is it used in preparing solutions of desired concentrations?
A stock solution is a solution of known higher concentration used to prepare solutions of desired concentrations through dilution.
Why does the molality of a solution not change with temperature?
The molality of a solution does not change with temperature because mass remains unaffected by temperature.
Explore the technological practices mentioned in Rigveda and Kautilya’s Arthashastra, such as tanning of leather, dying of cotton, and production of salt from sea. Discover the mastery in kiln temperature control and the ancient scientific knowledge found in Vedic literature.
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