Std-10 Most Imp Ch 5 Gseb L-1

0.1mol of CH_(3)NH_(2) (K_(b) = 5 xx 10^(-4)) is mixed with 0.08mol of HCI and diluted to 1L . Which statement is correct?

Sunita from std. X uses spectacles . Her spectacle number is -1.5 D . Find the focal length of the lens.

Identify the reaction order form each of the following rate constants: a. k = 7.06 xx 10^(-3) mol L^(-1) s^(-1) b. k = 5.6 xx 10^(-5) s^(-1) c. k = 1.25 xx 10^(-2) mol^(-1)l s^(-1) d. k = 1.25 xx 10^(-2) mol L^(2)s^(-1) e. k = 5.0 xx 10^(-6) atm^(-1)s^(-1)

A : When C_(2) H_(5) - O- CH_(3) is reacted with oen mole of Hl then C_(2)H_(5)OH& CH_(3) l is formed . R : It is S_(N)1 reaction

A buffer solution of pH value 4 is to be prepared, using CH_(3)COOH and CH_(3)COONa .How much amount of sodium acetate is to be added to 1.0L of M//10 acetic acid? (K_(a) = 2.0 xx 10^(-5))

List two most common STDs.

Most common bacterial STD is: