Coinage metals are actually __________?

Related Mcqs:

1. Which one of the following sets consists of all coinage metals ?

   A. Cu Hg Au
   B. Cu Ag Au
   C. Ag Au Hg
   D. Cu Fe Au

2. Which of following metals can be displaced by all other metals from its solution ?

   A. Ag
   B. A
   C. Au
   D. Cu

3. When electrons collide with heavy metals than ___________ are produced?

   A. Beta-rays
   B. Alpha-rays
   C. X-rays
   D. Gamma-rays

4. Any process of chemical decay of metals due to the action of surrounding medium is called__________________?

   A. activation
   B. enameling
   C. corrosion
   D. coating

5. Non-metals usually form _________________ oxides?

   A. Acidic
   B. Amphoteric
   C. Neutral
   D. All of the above

6. A elements are named as alkali metals because_______________?

   A. Their oxides are basic
   B. Their oxide and hydroxides are water soluble
   C. Both A & B
   D. They are found in earth

7. Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?

   A. Smaller electronegativity of alkali metals
   B. Smaller ionic radius of these metals
   C. De-excitation of electrons from higher energy levels to low energy level
   D. Excitation of electrons from low energy levels to higher energy levels

8. First ionization potential of alkaline earth metal is greater than alkali metals because___________________?

   A. They are more reactive
   B. They have greater atomic radii
   C. They have smaller atomic sizes
   D. All

9. Second ionization potential of alkali metals are very high due to_______________?

   A. being s-block elements
   B. inert gas configurations
   C. ns1 electronic configuration
   D. being metals

10. Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?

    A. Zeolites
    B. Sulphonides
    C. Lime
    D. Nitrates

    Submitted by: Rashid Mehmood