std 7 science ch 13 swadhyay full solution

Class 10 Complete Science UP Board 2024 Exam Full Revision and Syllabus | Target 95+

Find the values of k for which the system 2x+ky=13x-5y=7 will have ( i ) a unique solution,and (ii) no solution.Is there is a value of k for which the solution.Is there is many solutions?

There are 5 candidates for mathematics , 7 for science and 3 for arts scholarship . Find the number of ways of give one scholarship either for mathematics or for science or for arts.

a. Write an equilibriu equation for a solution containing CH_(3)COOH and CH_(3)COONa . What effect does CH_(3)COONa have on a solution of CH_(3)COOH ? b. What reagents should be added to a solution to increase i. [CH_(3)COO^(Theta)] ii. [overset(o+)NH_(4)]

A solution has pOH equal to 13 at 298 K . The solution will be

The pKw of water at 50^@C is 13.40. An aqueous solution at 50^@C has pH= 7. This solution is–