Answer
Verified
36.6k+ 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
To get a maximum current in an external resistance class 1 physics JEE_Main
If a wire of resistance R is stretched to double of class 12 physics JEE_Main
Let f be a twice differentiable such that fleft x rightfleft class 11 maths JEE_Main
Find the points of intersection of the tangents at class 11 maths JEE_Main
For the two circles x2+y216 and x2+y22y0 there isare class 11 maths JEE_Main
The path difference between two waves for constructive class 11 physics JEE_MAIN
Other Pages
Explain the construction and working of a GeigerMuller class 12 physics JEE_Main
The cell in the circuit shown in the figure is ideal class 12 physics JEE_Main
Two charges 9e and 3e are placed at a separation r class 12 physics JEE_Main
For an electromagnet the core should have A High retentivity class 12 physics JEE_Main
Dissolving 120g of urea molwt60 in 1000g of water gave class 11 chemistry JEE_Main
A closed organ pipe and an open organ pipe are tuned class 11 physics JEE_Main