Live Education Quiz

1

Which reactant remains unconsumed after reaction completion?

A Limiting reactant B Catalyst C Non-limiting reactant D Product

2

Dilution of a solution involves:

A Adding solute B Removing solute C Adding solvent D Heating solution

3

The unit of molarity is:

A mol/kg B g/L C mol/L D g/mol

4

Avogadro’s number is:

A 6.02 × 10^20 B 6.02 × 10^21 C 6.02 × 10^22 D 6.02 × 10^23

5

Which concentration unit is affected by temperature?

A Strength B Molarity C Mass percent D Mole fraction

6

Strength of solution changes with:

A Mass only B Volume only C Both mass and volume D Temperature only

7

Which reactant is present in excess amount?

A Limiting reactant B Non-limiting reactant C Product D Catalyst

8

In the equation 2H₂ + O₂ → 2H₂O, the mole ratio of H₂ to O₂ is:

A 1:1 B 2:1 C 1:2 D 2:2

9

What is the SI unit for amount of substance?

A Gram B Mole C Liter D Kilogram

10

Strength of a solution is defined as:

A Moles per liter B Grams per liter C Liters per mole D Moles per gram

11

Which unit is commonly used for strength?

A mol/L B g/L C g/mol D mol/kg

12

Percentage yield is calculated using which formula?

A (Actual/Theoretical) × 100 B (Theoretical/Actual) × 100 C Actual + Theoretical D Actual − Theoretical

13

Which term refers to the calculated amount of product?

A Actual yield B Percentage yield C Theoretical yield D Limiting yield

14

Which factor does NOT affect percentage yield?

A Side reactions B Purity of reactants C Balanced equation D Experimental loss

15

The amount of product formed depends on:

A Excess reactant B Limiting reactant C Temperature only D Pressure only

16

Which concentration unit depends on volume?