Std-10 Most Imp Ch 8 Gseb L-5

In a Std. X class, out of 40 students, 10 students use spectacles, 2 students have positive power and 8 students have negative power and 8 students have negative power of lenses in their spectacles . Generally which type of spectacles do most of the students use ?

The value of 8 − [8-5+8 -{8-(8-5+8)}+10] is: 8 − [8-5+8 -{8-(8-5+8)}+10] का मान है:

What is the pH of 7.0 xx 10^(-8)M acetic acid. What is the concentration of un-ionsed acetic acid. K_(a) of CH_(3)COOH = 1.8 xx 10^(-5) .

The K_(a) for CH_(3)COOH at 300 and 310 K are 1.8 xx 10^(-5) and 1.805 xx 10^(-5) , respectively. The enthalpy of deprotonation for acetic acid is 51.6 cal .

List two most common STDs.

Most common bacterial STD is:

Calculate the change in pH if 0.02 mol CH_(3)COONa is added to 1.0L of this solution. ltbRgt K_(a) of CH_(3)COOH = 1.8 xx 10^(-5) .

If l=LCM of 8!,10! and 12! and h=HCF of of 8!,10! and 12! then (l)/(h) is equal to