If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times. 100 10 70 20 TRUE ANSWER : ? YOUR ANSWER : ?
The evaporation of aqueous solution of sugar causes its molarity to increase. Decrease. Remain unchanged. Either A or B; depends on the concentration of the solution. TRUE ANSWER : ? YOUR ANSWER : ?
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0-5m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are Cm/s Mole/m².s.Pa M/s Kmole/m².s.Pa TRUE ANSWER : ? YOUR ANSWER : ?
Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm. 1 2 4 3 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is followed by an ideal solution ? Boyle's law Trouton's rule Raoult's law Amgat's law TRUE ANSWER : ? YOUR ANSWER : ?
The total number of atoms in 8.5 gm of NH₃ is __________ x 1023. 1.204 9.03 3.01 6.02 TRUE ANSWER : ? YOUR ANSWER : ?
The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight. Decreases Remains unchanged Increases Increases linearly TRUE ANSWER : ? YOUR ANSWER : ?
Total energy at a point comprises of __________ energy. Pressure Internal Potential & kinetic All of these TRUE ANSWER : ? YOUR ANSWER : ?
For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is 1 2 3 TRUE ANSWER : ? YOUR ANSWER : ?