Answer
Verified
40.2k+ views
Hint: Active mass is not a measure of mass in the solution. It is the activity of a substance in the solution which is the measure of concentration.
Complete step by step solution:
We should take the active mass of a substance as activity of a substance in the given solution available for reaction. The activity of a substance in a solution refers to the number of moles available for reaction in a unit volume of solution. So concentration is also a measure of the activity of a substance in solution. And generally, the number of moles of substance present in the solution will completely involve a reaction. So the number of moles present can be equated to the number of moles involved in a reaction. Active will be equal to molarity of substance. Molarity of a substance is the number of gram moles per litre of solution.
Therefore, option B is correct.
Note: We may think active mass as a measure of mass present per given amount of volume but this is not true. We also should not confuse between gram moles and gram equivalents. Active mass is not always equal to concentration. For some substances which are present in the solution but only some part of them involve reaction concentration is not equal to active mass.
Complete step by step solution:
We should take the active mass of a substance as activity of a substance in the given solution available for reaction. The activity of a substance in a solution refers to the number of moles available for reaction in a unit volume of solution. So concentration is also a measure of the activity of a substance in solution. And generally, the number of moles of substance present in the solution will completely involve a reaction. So the number of moles present can be equated to the number of moles involved in a reaction. Active will be equal to molarity of substance. Molarity of a substance is the number of gram moles per litre of solution.
Therefore, option B is correct.
Note: We may think active mass as a measure of mass present per given amount of volume but this is not true. We also should not confuse between gram moles and gram equivalents. Active mass is not always equal to concentration. For some substances which are present in the solution but only some part of them involve reaction concentration is not equal to active mass.
Recently Updated Pages
silver wire has diameter 04mm and resistivity 16 times class 12 physics JEE_Main
A parallel plate capacitor has a capacitance C When class 12 physics JEE_Main
A series combination of n1 capacitors each of value class 12 physics JEE_Main
When propyne is treated with aqueous H2SO4 in presence class 12 chemistry JEE_Main
Which of the following is not true in the case of motion class 12 physics JEE_Main
The length of a potentiometer wire is 10m The distance class 12 physics JEE_MAIN
Other Pages
The mole fraction of the solute in a 1 molal aqueous class 11 chemistry JEE_Main
Formula for number of images formed by two plane mirrors class 12 physics JEE_Main
In order to convert Aniline into chlorobenzene the class 12 chemistry JEE_Main
Explain the construction and working of a GeigerMuller class 12 physics JEE_Main
Which of the following is not a redox reaction A CaCO3 class 11 chemistry JEE_Main
If a wire of resistance R is stretched to double of class 12 physics JEE_Main