Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Potassium is a gas at room temperature.
B
Potassium reacts vigorously with water to produce potassium hydroxide and hydrogen gas.
C
Potassium has a higher melting point than sodium.
D
Potassium is less reactive than lithium.
Understanding the Answer
Let's break down why this is correct
Answer
Potassium is a very soft, silvery metal that is highly reactive, especially with water. When it touches water it reacts vigorously, producing hydrogen gas and a strong alkaline solution. Because it has only one valence electron, it easily loses that electron to form a +1 ion, giving it the same chemical behavior as other alkali metals. For example, a small piece of potassium dropped into a glass of water splashes and fizzles as hydrogen bubbles appear. This reactivity and tendency to form K⁺ ions are the defining features of potassium.
Detailed Explanation
When potassium touches water, it gives up its single outer electron and reacts quickly. Other options are incorrect because Metals are solid at room temperature, not gases; Heavier alkali metals do not have higher melting points.
Key Concepts
Group 1 elements
potassium (K)
Topic
Alkali Metals
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1Which of the following statements is true regarding rubidium (Rb), an alkali metal?
easyChemistry
Practice
2
Question 2Which chemical property of potassium (K) distinguishes it from other alkali metals?
mediumChemistry
Practice
3
Question 3Which of the following statements correctly describes the properties of potassium (K), an alkali metal in Group 1 of the periodic table?
mediumChemistry
Practice
4
Question 4Which of the following statements accurately describe the properties and behaviors of alkali metals? Select all that apply.
hardChemistry
Practice
5
Question 5Which of the following statements is true regarding rubidium (Rb), an alkali metal?
easyChemistry
Practice
6
Question 6Which chemical property of potassium (K) distinguishes it from other alkali metals?
mediumChemistry
Practice
7
Question 7Which of the following statements accurately describe the properties and behaviors of alkali metals? Select all that apply.
hardChemistry
Practice
Ready to Master More Topics?
Join thousands of students using Seekh's interactive learning platform to excel in their studies with personalized practice and detailed explanations.