Which alkali metal is known for its vigorous reaction with water? (2022)

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Question: Which alkali metal is known for its vigorous reaction with water? (2022)

Options:

Correct Answer: Potassium

Exam Year: 2022

Solution:

Potassium (K) reacts vigorously with water, producing potassium hydroxide and hydrogen gas.

Which alkali metal is known for its vigorous reaction with water? (2022)

Which alkali metal is known for its vigorous reaction with water? (2022)

Step 1: Identify the group of elements called alkali metals. These are found in Group 1 of the periodic table.
Step 2: Recall that alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Step 3: Understand that alkali metals react with water, but some react more vigorously than others.
Step 4: Focus on potassium (K), which is known for its vigorous reaction with water.
Step 5: When potassium reacts with water, it produces potassium hydroxide (KOH) and hydrogen gas (H2).
Step 6: Conclude that potassium is the alkali metal known for its vigorous reaction with water.

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