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Some Basic Concepts in Chemistry

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Demo Practice — 10 Questions

Practice Questions & PYQs

Practice

One mole contains approximately:

Practice

The molar mass of H₂O is approximately:

Practice

The number of moles in 44 g of CO₂ is:

Practice

The empirical formula shows:

Practice

Which law states that mass is neither created nor destroyed in a chemical reaction?

Practice

The SI unit of amount of substance is:

Practice

The molar mass of O₂ is:

Practice

If 2 mol of H₂ react completely with 1 mol of O₂, the product is:

Practice

The limiting reagent is the reactant that:

Practice

Mass percent of a component is calculated as: