Test 00 Sunday tests sampleBy Bomvirtual.com / June 15, 2025 0% 0 votes, 0 avg 98 123456789101112131415 Sunday Tests 2026 Sample Sunday Test This demo test only contain few MCQs. it’s just for checking that our website is working on your phone perfectly or not 1 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 1) Avogadro’s constant is the number of ETEA – 2019 Atoms in 1g of He electrons present in 2g H atoms in 24g of Mg molecules in 35.5g of chlorine Avogadro’s constant represents the number of entities in a mole of a substance, not specifically tied to any of the options given in the context of a specific weight or element. 2 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 2) Identify the correct option with same empirical formula for both compounds NUMS 2020 C₆H₁₂O₆ & CH₃COOH H₂S₂O₃ & H₂SO₄ C₆H₁₂ & C₆H₆ H₂O & H₂O₂ (a) H₂O & H₂O₂ → H₂O (empirical formula: H₂O), H₂O₂ (empirical formula: HO) → Different , (b) C₆H₁₂ & C₆H₆ → C₆H₁₂ (empirical formula: CH₂), C₆H₆ (empirical formula: CH) → Different, (c) H₂S₂O₃ & H₂SO₄ → H₂S₂O₃ (empirical formula: H₂S₂O₃), H₂SO₄ (empirical formula: H₂SO₄) → Different, (d) C₆H₁₂O₆ & CH₃COOH → C₆H₁₂O₆ (empirical formula: CH₂O), CH₃COOH (empirical formula: CH₂O) → Same 3 / 15 Category: BOMVirtual.com >> Physics >> 02 Vectors >> product of Vectors 3) If A × B = C, then which of the following statements is wrong C ⊥ (A + B) C ⊥ (A × B) C ⊥ A C ⊥ B From the property of vector product, we notice that C must be perpendicular to the plane formed by vector A and B. Thus C is perpendicular to both A and B and (A + B) vector also, must lie in the plane formed by vector A and B. thus C must be perpendicular to (A + B) also but the cross product (A X B) gives a vector C which can-not be perpendicular to itself. Thus the last statement is wrong. 4 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 4) Number of molecules in 100 ml of each of O₂, NH₃ and CO₂ at STP are NH₃ < O₂ < CO₂ NH₃ = CO₂ = O₂ CO₂ < O₂ < NH₃ NH₃ = CO₂ < O₂ According to avogadro’s hypothesis equal volumes of all gases under similar conditions of temperature and pressure contains equal no. of molecules. 5 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 5) One molecule of oxygen has the same mass as ETEA – 2023 2 molecules of CH₄ One gram atom of Sulphur 16 moles of H₂ 8 moles of helium CH4 = 16 amu x 2 = 32 amu 6 / 15 Category: BOMVirtual.com >> Physics >> 02 Vectors >> product of Vectors 6) If for two vectors A and B, A × B = 0, the vectors Are parallel to each other Act at an angle of 30° Act at an angle of 60° Are perpendicular to each other A x B = 0 → Sinθ=0 → θ=0°. → Two vectors will be parallel to each other. 7 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 7) One litre of a gas at STP weighs 1.16 g it can possibly be C₂H₂ CH₄ O₂ CO 1L of gas at S.T.P. weight 1.16g, 22.4 L of gas at S.T.P. weight =22.4x 1.16 = 25.984 = 26, This molecular weight indicates that given compound is C2H2 8 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 8) The empirical formula of Glucose C₆H₁₂O₆ is: ETEA – 2020 CH₂O CH₂O₂ C₆H₁₂O₆ CHO The empirical formula of glucose (C6H12O6) is CH2O. The empirical formula represents the simplest whole-number ratio of the elements in a compound. 9 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 9) Which of the following pairs have the same electronic structure? ETEA 2006 Ag & Sn Ar & Cl Ca & Ar Mg & Na Ar &Cl are Iso-electronic between both have 18 e. 10 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 10) 4.4 g of an unknown gas occupies 2.24L of volume at standard temperature and pressure. The gas may be Oxygen Carbon dioxide Sulphur dioxide Carbon monoxide 2.24L of gas has mass = 4.4gm, 22.4L of gas has mass 4.4 x 22.4 / 2.24 = 44, So given gas is CO2 because CO2 has molecular mass=44. 11 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 11) One mole of which of the following bucky ball will have more molecules? ETEA – 2019 C₅₀ C₆₀ all same C₂₀ One mole of any substance, including buckyballs, contains Avogadro’s number of molecules, so they all have the same number of molecules 12 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 12) Molecular mass of the compound is 60 and its empirical formula is CH₂O. What will be the molecular formula of the compound? ETEA – 2022 C₂H₆O₂ C₂H₈O₂ C₆H₁₂O₆ C₂H₄O₂ Given the empirical formula CH2O and a molecular mass of 60. The molecular formula is a multiple of the empirical formula. The molar mass of the empirical formula is calculated as C = 12.01, H2 = 2.02, O = 16.00, so total = 30.03 g/mol. The ratio of the molecular mass to the empirical formula mass will give us the multiplier to find the molecular formula. 13 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 13) In a vessel, 10g N₂, 10g H₂, and 10g O₂ are present. Which one will have the least number of atoms? ETEA – 2020 Both H₂ & N₂ O₂ N₂ H₂ Moles of N₂ = 10g / 28g/mol = 0.357, Moles of H₂ = 10g / 2g/mol = 5, Moles of O₂ = 10g / 32g/mol = 0.3125, Since each molecule contains two atoms, the total number of atoms is:, N₂ atoms = 0.357 × 2 = 0.714, H₂ atoms = 5 × 2 = 10, O₂ atoms = 0.3125 × 2 = 0.625, The gas with the least number of atoms is O₂. 14 / 15 Category: BOMVirtual.com >> Chemistry >> 01 Stoichiometry >> Mole 14) Cylinder “A” contains 4.6 grams of C₂H₅OH and cylinder “B” has 3 grams C₂H₆: ETEA 2016 Cylinder A has greater number of molecules than cylinder B none of these Both cylinders have the equal number of hydrogen atoms Both cylinder A and B have equal number of molecules Cylinder A (C₂H₅OH, Ethanol) Molar mass of C₂H₅OH = 46 g/mol, Moles in A = 4.6 g / 46 g/mol = 0.1 moles, Cylinder B (C₂H₆, Ethane), Molar mass of C₂H₆ = 30 g/mol, Moles in B = 3 g / 30 g/mol = 0.1 moles, Since both cylinders contain 0.1 moles, and 1 mole contains Avogadro’s number of molecules, both A and B have an equal number of molecules. 15 / 15 Category: BOMVirtual.com >> Physics >> 02 Vectors >> Torque and moment of force 15) The physical quantity which produces angular acceleration in body. ETEA 2010+2011 Torque Centripetal force Impulse Force Torque (τ = Iα) is the rotational analog of force that causes angular acceleration Your score is 0% Restart quiz
