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

Related Mcqs:

1. 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

2. 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

3. 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

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

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

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

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

6. Which one of the following is not an alkali metal ?

   A. Francium
   B. Caesium
   C. Rubidium
   D. Radium

7. The word Alkali means__________________?

   A. Base
   B. Basic salt
   C. Ashes
   D. Spirit

8. Metallic characters of alkali metals_____________________?

   A. Increase down the group
   B. Decrease down the group
   C. No regular trend
   D. Remain same

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

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

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