Free Test Mole concept – NEET

Q1: What is one mole of a substance?

A. 6.022 × 10^23 particles of the substance B. 1 gram of the substance C. 1 liter of the substance D. 1 molecule of the substance

Q2: Avogadro’s number is:

A. 6.022 × 10^23 B. 3.14 × 10^7 C. 1.6 × 10^-19 D. 9.81 m/s^2

Q3: Molar mass is defined as:

A. Mass of one mole of a substance B. Mass of one atom C. Mass of one molecule D. Mass of one ion

Q4: The unit of molar mass is:

A. grams per mole B. grams C. moles D. liters

Q5: What does the empirical formula represent?

A. Simplest whole number ratio of atoms B. Exact number of atoms in a molecule C. Mass ratio of atoms D. Volume ratio of atoms

Q6: Which of the following is equal to one mole?

A. 12 grams of carbon-12 B. 1 gram of hydrogen C. 22.4 liters of oxygen at STP D. 1 atom of helium

Q7: What is the volume of one mole of an ideal gas at STP?

A. 22.4 liters B. 1 liter C. 12 liters D. 6.022 × 10^23 liters

Q8: How many atoms are present in 12 grams of carbon-12?

A. 6.022 × 10^23 atoms B. 12 atoms C. 1 atom D. 24 atoms

Q9: Molecular formula represents:

A. Actual number of atoms in a molecule B. Simplest ratio of atoms C. Mass ratio D. Volume ratio

Q10: If 1 mole of a gas occupies 22.4 liters at STP, what volume will 2 moles occupy?

A. 44.8 liters B. 11.2 liters C. 22.4 liters D. 2 liters

Q11: What is the formula to calculate number of moles (n)?

A. n = mass / molar mass B. n = mass × molar mass C. n = volume / pressure D. n = pressure / volume

Q12: Which quantity is equal to Avogadro’s number?

A. Number of atoms in 12 g of carbon-12 B. Number of molecules in 1 g of water C. Number of ions in 1 mol NaCl D. Number of electrons in 1 atom

Q13: What is the relationship between molecular mass and molar mass?

A. Molar mass = molecular mass in grams B. Molar mass = molecular mass in amu C. No relation D. Molecular mass = molar mass × 2

Q14: One mole of oxygen molecules contains how many atoms?

A. 1.2044 × 10^24 atoms B. 6.022 × 10^23 atoms C. 3.011 × 10^23 atoms D. 12 atoms

Q15: Which unit is NOT used to express amount of substance?

A. Liter B. Mole C. Molecule D. Atom

Q16: Mole concept helps in relating:

A. Mass, volume and number of particles B. Energy and mass C. Pressure and temperature D. Force and acceleration

Q17: What is the molar mass of water (H2O)?

A. 18 g/mol B. 16 g/mol C. 1 g/mol D. 20 g/mol

Q18: Which of the following is NOT equal to one mole?

A. 1 liter of oxygen gas at room temperature B. 6.022 × 10^23 atoms C. 12 grams of carbon-12 D. 22.4 liters of gas at STP

Q19: How many molecules are present in 36 grams of water?

A. 6.022 × 10^23 molecules B. 3.011 × 10^23 molecules C. 1 mole D. 18 molecules

Quiz for Mole concept