What will be the mass of one atom of ${}^{12}\mathrm{C}$ ?

Important Questions on Some Basic Concepts of Chemistry

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>WBJEE 2020>Q 2

Which of the following has the largest number of atoms?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>WBJEE 2019>Q 3

At S.T.P. the volume of $7.5 \mathrm{g}$ of a gas is $5.6 \mathrm{L}$. The gas is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>WBJEE 2018>Q 4

How many moles of electrons will weigh one kilogram ?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>WBJEE 2019>Q 5

In the crystalline solid $MS{O}_4·n{\mathrm{II}}_2\mathrm{O}$ of molar mass $250 \mathrm{g} {\mathrm{mol}}^{-1},$ the percentage of anhydrous salt is $64$ by weight. The value of $n$ is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>WBJEE 2018>Q 6

A metal $\mathrm{M}$ (specific heat $0.16$ ) forms a metal chloride with $65\%$ chlorine present in it. The formula of the metal chloride will be

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>WBJEE 2020>Q 7

The mole fraction of ethanol in water is $0.08$. Its molality is