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. 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...

6. 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...

7. 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...

8. Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?

   A. Lithium B. Sodium C. Potassium D. Rubidium...

9. 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...

10. Which of the following statements is false about transition metals?

    A. They form complexes B. They show variable valency C. All transition metal compounds are paramagnetic D. They form coloured ions Submitted by: Muhammad Ali Kunbhar...