Two solutions of a substance (non-electrolyte) are mixed in the following manner: 480 ml of 1.5 M first solution+ 520 ml of 1.2 M second solution. What is the molarity (M) of the final mixture? (1) 1.250 (3) 1.433 (2) 1.344 (4) 1.479
If the intracellular pH of a cell becomes basic, which one of the following will help reduce the pH? (1) Export of Cl and import of HCO (2) Import of Cl and export of HCO (3) Import of Na” and HCO3- and export of Cl (4) Export of Na’ and Cl If the intracellular pH … Read more
If the pH of a solution goes from 8 to 7, this means that the hydrogen ion concentration has: (1) decreased by 1 mole/liter. (2) increased by 1 mole/liter. (3) decreased 10 fold. (4) increased 10 fold The pH scale is logarithmic, meaning that a decrease of 1 unit in pH corresponds to a 10-fold … Read more
If 5 ml of 20% ethanol is mixed with 25 ml of 80% ethanol, the resulting solution will approximately be (1) 50% ethanol (3) 100% ethanol (2) 70% ethanol (4) 80% ethanol
If you were to take 1.0 ml of a solution of HCl with a pH of 4.0 and add it to 9.0 ml of distilled water, what would be the pH of the final solution? (1) The pH would remain unchanged. (2) The pH would rise to 5.5. (3) The pH would rise to 5.0. … Read more
What will be the required volumes of 1N HCl and 4N NaOH to prepare one litre solution of pH 77 (1) 500 ml, 500 ml. (3) 600 ml, 400 ml (2) 800 ml, 200 ml (4) 200 ml, 800 ml To prepare 1 litre of a solution with pH = 7 using 1N HCl and … Read more
The pH of a 0.001 molar HCl solution in H₂O is: (1) 1 (2) 2 (3) 3 (4) 4 To determine the pH of a 0.001 M HCl solution, follow these steps: Step 1: Understanding pH Calculation HCl is a strong acid, meaning it fully dissociates in water: The concentration of H⁺ ions in solution … Read more
How many millilitres of 0.05 N HCI are required to neutralize eight grams of NaOH? (1) 5000 (2) 4000 (3) 4500 (4) 5050 To determine the volume of 0.05 N HCl required to neutralize 8 g of NaOH, follow these steps: Step 1: Calculate Moles of NaOH Molecular weight of NaOH = 40 g/mol Moles … Read more
Which of the following statements are TRUE for hydrogen bonds? Strength of hydrogen bond is (1) high in a solvent of high dielectric constant (2) low in a solvent of low dielectric constant (3)lower in water as compared to organic solvents (4) higher in water as compared to organic Hydrogen bond strength is influenced by … Read more
Match enzymes of TCA cycle in Group I with that of their products listed in Group II. Group I P. Isocitrate dehydrogenase Q. Succinate dehydrogenase R. Fumarase S. x-Ketoglutarate dehydrogenase Group II 1. x-Ketoglutarate 2. Succinyl CoA 3. Fumarate 4. Malate (1) P-1, Q-2, R-4, S-3 (2) P-3, Q-1, R-2, S-4 (3) P-2, Q-4, R-3, … Read more