Dhoran 8 Ganit Paper Solution April 2022 || Std 8 Maths

The mole fraction of a solvent in a solution is 0.8 . The mole fraction of the solute will be _____.

An aqueous solution with pH 8 is acidic.

The equation ((log)_8(8/(x^2)))/(((log)_8x^2))=3 has- a. no integral solution b. one natural c. two real solution d. one irrational solution

The equation x-(8)/(|x-3|)=3-(8)/(|x-3|) has only one solution (b) infinite solutions no solution (d) none of these

The [OH] in a solution is 1xx10^(8) . The pH of the solution is

There are 3 parts A,B and C in a question paper of Math's, which includes 6,7 and 8 questions respectivelty. From these parts 3,4 and 5 questions respectively are to be solved. In how many ways can a student select the questions from these parts?