FREE CHEMISTRY ONLINE TEST – 05 August 22, 2025August 22, 2025 BIKKI NEWS : Free chemistry online test 05 for JEE NEET EAPCET EXAMS. జేఈఈ నీట్ ఎఫ్సెట్ వంటి ప్రవేశ పరీక్షల కొరకు ఉచితంగా కెమిస్ట్రీ ఆన్లైన్ టెస్ట్ లను విద్యార్థుల కొరకు అందించడం జరుగుతుంది. Free chemistry online test 05 for JEE NEET EAPCET EXAMS CHEMISTRY ONLINE TEST 05 1 / 10 According to Arrhenius concept, an acid is: A substance that gives H⁺ ions in solution A substance that gives OH⁻ ions in solution A substance that accepts a proton A substance that donates a pair of electrons 2 / 10 Which of the following is a Lewis acid? NH₃ H₂O OH⁻ BF₃ 3 / 10 In aqueous solution, which acid is stronger? HF CH₃COOH HCl H₂CO₃ 4 / 10 Which of the following pairs represents conjugate acid-base pair? HCl / Cl⁻ NH₄⁺ / NH₃ H₂O / OH⁻ All of these 5 / 10 pH of 0.01 M HCl solution is: 2 1 3 4 6 / 10 The base dissociation constant (K_b) of NH₃ is 1.8 × 10⁻⁵. What is the pK_b value? 5.74 4.74 3.74 2.74 7 / 10 Which of the following solutions will have the highest pH? 0.1 M NaOH 0.1 M HCl 0.1 M CH₃COOH 0.1 M NH₄Cl 8 / 10 buffer solution can be prepared from: Strong acid + strong base Weak base + its salt with strong acid Weak acid + its salt with strong base Both (b) and (c) 9 / 10 The ionic product of water (K_w) at 25 °C is: 1 × 10⁻¹² 1 × 10⁻¹⁴ 1 × 10⁻¹⁶ 1 × 10⁻¹⁰ 10 / 10 Which of the following indicators is suitable for strong acid–strong base titration? Methyl orange Phenolphthalein Both (a) and (b) None Your score isThe average score is 63% 0% Restart quiz