Some Basic Concepts In Chemistry Mock Tests
38 questions available
Some Basic Concepts In Chemistry Mock Test 1
Questions:
30
Some Basic Concepts In Chemistry Mock Test 2
Questions:
8
Sample Questions
Which of the following statements about the law of multiple proportions is correct?
Moles of electrons transferred per mole of Al2O3 formed from elements:
Which of the following species has the highest electron gain enthalpy?
Calculate the mass of sodium hydroxide (NaOH) required to prepare 250 mL of 0.5 M NaOH solution. (Na = 23, O = 16, H = 1)
2.8 g of iron reacts with 2.4 g of sulfur to form FeS. What is the limiting reagent? (Fe = 56 g/mol, S = 32 g/mol)
The number of significant figures in 0.002503 is:
A compound contains 40% carbon, 6.67% hydrogen, and 53.33% oxygen by mass. Its molecular mass is 90 g/mol. What is its molecular formula? (C = 12, H = 1, O = 16)
The percentage of nitrogen in urea (NH₂CONH₂, molar mass = 60 g mol⁻¹) is approximately:
Comments
No comments yet. Be the first to share your thoughts!