Quiz for Molecularity

Q1: What is the molecularity of the reaction A + B → Products?

A. 1 B. 2 C. 3 D. Cannot be determined

Q2: Molecularity of a reaction is defined as the number of...

A. Atoms involved in reaction B. Reactant molecules involved in elementary step C. Products formed D. Molecules in overall reaction

Q3: A reaction with molecularity of 3 is called...

A. Unimolecular B. Bimolecular C. Trimolecular D. Tetramolecular

Q4: The reaction 2NO + O2 → 2NO2 is...

A. Unimolecular B. Bimolecular C. Trimolecular D. Zero molecular

Q5: Which of the following is NOT true about molecularity?

A. It is always a whole number B. It is defined for overall reaction C. It cannot be zero D. It is theoretical concept

Q6: Molecularity of a complex reaction is...

A. Zero B. One C. Two D. Not defined

Q7: Which statement is correct?

A. Molecularity can be fractional B. Molecularity and order are same always C. Molecularity is always a positive integer D. Molecularity equals number of products

Q8: Molecularity of the reaction: N2O5 → 2NO2 + ½O2 is?

A. 1 B. 2 C. 3 D. 4

Q9: Reaction with one molecule involved is called...

A. Unimolecular B. Bimolecular C. Trimolecular D. Elementary

Q10: Which of the following can have molecularity of 2?

A. H2 → 2H B. H2 + I2 → 2HI C. A → B + C D. None of the above

Q11: Can molecularity ever be zero?

A. Yes B. No C. Sometimes D. Only for catalysts

Q12: Which of the following reactions is unimolecular?

A. A + B → C B. A → B + C C. 2A + B → D D. None

Q13: Unit of molecularity is...

A. mol/L B. L/mol C. mol⁻¹s⁻¹ D. No units

Q14: In a trimolecular reaction, number of molecules colliding simultaneously is...

A. 1 B. 2 C. 3 D. 4

Q15: Which of these reactions is likely elementary?

A. A + B → AB B. A + B + C → ABC C. 2A → A2 D. All of these

Q16: The molecularity of photochemical reaction is...

A. 1 B. 2 C. Varies D. Not defined

Q17: Reaction: A + B + C → Product. Molecularity?

A. 1 B. 2 C. 3 D. Cannot say

Q18: Which is always whole number?

A. Order B. Molecularity C. Rate constant D. None

Q19: Molecularity is applicable to...

A. Overall reactions B. Reversible reactions C. Elementary reactions D. Equilibrium only

Q20: The rate of reaction depends on...

A. Molecularity B. Order C. Number of products D. Catalyst only