Which of the following reactions illustrates an amphoteric compound?
A. NaOH + HBr ? NaBr + H2O
B. 2 H2 + O2 ? 2 H2O
C. 2 HF ? H2F+ + F-
D. All are amphoteric.
E. none of the above
Answer: C
You might also like to view...
The world ocean covers about 97% of the Earth's surface
Indicate whether the statement is true or false
What is(are) the main cause(s) of Burma's (Myanmar's) lack of economic development?
A) internal warfare B) an international economic embargo C) economic policy D) a lack of resources and economic policy E) internal warfare and economic policy
The geostrophic wind is caused by the interaction of these two forces
A) frictional force and horizontal pressure gradient force. B) centrifugal force and Coriolis force. C) gravitational force and vertical pressure gradient force. D) Coriolis force and gravitational force. E) horizontal pressure gradient force and Coriolis force.
Viscosity is a property of a fluid that relates to how easily the fluid flows. A material that is viscous ________.
A. is always cold B. flows easily C. is always hot D. flows less easily E. is always a solid