Alkali Metals Quiz

Which of the following is NOT a physical property of Group 1 metals?

• Low melting points compared to most other metals

• High density compared to most other metals

• Softness, allowing them to be cut with a knife

• Shiny appearance when freshly cut

What happens when a Group 1 metal is exposed to water?

• It catches fire

• It dissolves forming a neutral solution

• It reacts vigorously, producing hydrogen gas and a metal hydroxide

• Nothing significant happens

Which Group 1 metal is the most reactive?

• Lithium

• Sodium

• Potassium

• Francium

Why should alkali metals be stored under oil?

• To prevent them from reacting with the nitrogen in the air

• To keep them cool and prevent melting

• To prevent them from reacting with oxygen and moisture in the air

• To increase their shelf life by preventing oxidation

What is the trend in melting points as you move down Group 1?

• Melting points increase

• Melting points decrease

• Melting points remain constant

• Melting points first decrease, then increase

Which of the following statements about the reactivity of Group 1 metals is true?

• Reactivity decreases as you move down the group

• Reactivity increases as you move down the group

• Reactivity remains constant throughout the group

• Reactivity first increases, then decreases as you move down the group

What is the general equation for the reaction of alkali metals with water?

What safety precaution is NOT necessary when handling alkali metals?

• Using a SMALL piece of the metal

• Wearing goggles

• Carrying out the experiment in a fume cupboard

• Using a safety screen

Which of the following is a correct statement about the density of Group 1 metals?

• They are denser than water, sinking when placed in it

• They are less dense than water, floating when placed in it

• Their density does not affect their interaction with water

• They become denser as they react with water

How does the color of the flame change when Group 1 metals are burned?

• It does not change; the flame remains colorless

• It changes to violet for all Group 1 metals

• It changes depending on the metal, showing colors like red, lilac, and yellow

• It always turns blue