Seema Saini Solutions for Chapter: Some Basic Concepts, Mole Concept and Stoichiometry, Exercise 2: DPP 1.2

Two oxides of metal contain $50\%$ and $40\%$ metal respectively. If the formula of the first oxide is ${\mathrm{MO}}_2$, the formula of the second oxide will be:

If isotopic distribution of ${\mathrm{C}}^{12}$ and ${\mathrm{C}}^{14}$ is $98.0\%$ and $2.0\%$, respectively, then the number of ${\mathrm{C}}^{14}$ atoms in $12 \mathrm{g}$ of carbon sample will be:

One of the statements of Dalton's atomic theory is given below: "Compounds are formed when atoms of different elements combine in a fixed ratio."

Which of the following laws is/are not related to this statement?

Which of the statements are true?

Which of the following statements are correct?

Which of the statements are true about the law of chemical combination?

Which of the following pair of compounds illustrate the law of multiple proportions?

On the atomic scale, the atomic weight of $\mathrm{Ca}$ is $40$ $\mathrm{u}$. If one $\mathrm{u}$ is redefined as per the question, which of the following would be correct?