The normality of $0.3 \mathrm{M}$ phosphorous acid :

Important Questions on Some Basic Concepts of Chemistry

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-I (Conceptual Questions)>Q 118

The mole fraction of oxygen in a mixture of 7 g of nitrogen and 8 g of oxygen is:

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-I (Conceptual Questions)>Q 119

Mole fraction of ethanol in ethanol water mixture is $0.25$. Hence, the percentage concentration of ethanol by weight of the mixture is:

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-I (Conceptual Questions)>Q 120

A $500 \mathrm{g}$ toothpaste sample has $0.02 \mathrm{g}$ fluoride concentration. What is the concentration of fluorine in terms of ppm level?

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-I (Conceptual Questions)>Q 121

Two Bottles of A and B contains 1M and 1m aqueous solution $\left(\mathrm{d}\simeq 1\mathrm{g}/\mathrm{mL}\right)$ has sulphuric acid respectively -

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-II (Previous Year Questions)>Q 1

What volume of oxygen gas $\left({\mathrm{O}}_2\right)$, measured at $0°\mathrm{C}$ and $1 \mathrm{atm}$, is needed to burn $1\mathrm{L}$ of propane gas completely $\left({\mathrm{C}}_3{\mathrm{H}}_8\right)$, measured under the same conditions?

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-II (Previous Year Questions)>Q 2

Volume occupied by one molecule of water (density $=1\mathrm{g} {\mathrm{cm}}^{-3}$ ) is:

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-II (Previous Year Questions)>Q 3

How many moles of lead $\left(\mathrm{II}\right)$ chloride will be formed from a reaction between $6.5 \mathrm{g}$ of $\mathrm{PbO}$ and $3.2 \mathrm{g}$ of $\mathrm{HCl}$? (Atomic weight of $\mathrm{Pb}=207$)

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Beta Question Bank for Medical: Chemistry>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISE-II (Previous Year Questions)>Q 4

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave $\mathrm{C},38.71\%$ and $\mathrm{H},9.67\%$. The empirical formula of the compound would be: