Q. A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)

View solution

Q. The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour

View solution

Q. Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the

View solution

Q. In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the

View solution

Q. Which of the following is an exothermic reaction ?

View solution

Q. Heat of solution in a system in which both solute and solvent are liquids is termed as

View solution

Q. A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is

View solution

Q. Average molecular weight of air is about

View solution

Q. 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H₂ produced will be __________ gm.

View solution

Q. Pick out the wrong unit conversion of calorific value.

View solution

Q. Increasing the temperature of an aqueous solution will cause decrease in its

View solution

Q. Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.

View solution

Q. One micron is equal to

View solution

Q. Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10⁻³ T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to - 100°C is

View solution

Q. Gases diffuse faster compared to liquids because of the reason that the liquid molecules

View solution

Q. Equal masses of CH₄ and H₂ are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is

View solution

Q. CaCO₃ contains __________ percent of Ca by weight.

View solution

Q. Solutions which distil without change in composition are called

View solution

Q. Gases having same reduced temperatures and reduced pressures

View solution

Q. Which of the following is not a unit of pressure ?

View solution