Alkali Metals Quiz

Why are alkali metals stored under oil?

• To prevent them from melting

• To stop them from reacting with oxygen

• To enhance their reactivity

• To keep them shiny

What happens to the melting points of alkali metals as their atomic number increases?

• They increase

• They decrease

• They remain constant

• They fluctuate randomly

What is produced when alkali metals react with water?

• Oxygen

• Hydrogen gas

• Carbon dioxide

• Nitrogen gas

Which alkali metal is the least reactive?

• Lithium

• Sodium

• Potassium

• Francium

What color does the solution turn when alkali metals dissolve in water?

• Red

• Blue

• Colorless

• Green

What is the charge of the ion formed by alkali metals?

• +1

• -1

• +2

• -2

What is the product when sodium reacts with chlorine?

• Sodium oxide

• Sodium chloride

• Sodium hydroxide

• Sodium carbonate

Which alkali metal is known to ignite with a lilac flame?

• Lithium

• Sodium

• Potassium

• Rubidium

What is the trend in reactivity of alkali metals as you go down the group?

• Reactivity decreases

• Reactivity increases

• Reactivity remains constant

• Reactivity fluctuates

What is the appearance of alkali metals when freshly cut?

• Dull and gray

• Shiny and silver

• Rusty and brown

• Black and matte