Water has the ability to dissolve ionic compounds due to ……….
a) dipole-dipole forces
b) hydrogen bonding
c) ionic-dipole forces
d) ionic forces
All salt cause water become hard except ……
a) calcium chloride
b) sodium chloride
c) calcium bicarbonate
d) magnesium bicarbonate
Chlorine act as a bleaching agent in the presence of ……………
a) HCl
b) H2O
c) NaOH
d) HNO3
The disease which cause liver infection.
a) hepatitis
b) cholera
c) typhoid
d) dysentery
All are waterborne disease except………….
a) cholera
b) typhoid
c) malaria
d) dysentery
