Select Goal &
City
Select Goal
Explore
Question:
Lithium salts are mostly hydrated.
The hydration enthalpies of alkali metal ions decrease with increase in ionic sizes.
Lithium salts are mostly hydrated.
The hydration enthalpies of alkali metal ions decrease with increase in ionic sizes.
Updated On: Jul 6, 2022
- If both assertion and reason are true and reason is the correct explanation of assertion
- If both assertion and reason are true but reason is not the correct explanation of assertion
- If assertion is true but reason is false
- If both assertion and reason are false
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Lithium is the smallest in size among the alkali metals. Hence, $Li ^{+}$ion can polarize water molecules more easily than other alkali metals. As a result, water molecules get attached to lithium salts as water of crystallization.
Hence, lithium salts such as trihydrated lithium chloride (LiC1.3H20) are commonly hydrated. As the size of the ions increases, their polarizing power decreases. Thus hydration enthalpies decreases. Hence, other alkali metal ions usually form anhydrous salts.
Was this answer helpful?
0
0
Top Questions on GROUP 1 ELEMENTS
- The compound which does not exist.
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
- Read the following two statements
Statement I: Ionic radius of Li+ is greater than Mg++
Statement II: Lithium and magnesium can't form superoxide- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
Which of the following has the highest hydration energy?
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Metallic sodium dissolved in liquid ammonia giving a deep blue solution which is paramagnetic.
Reasons R: The deep blue solution to the formation of amide.
In the light of the above statements, the correct answer from the options below:- NEET (UG) - 2023
- Chemistry
- GROUP 1 ELEMENTS
- In which form does \(BeCl_{2}\) exist in the solid state, vapor state and high temperature?
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
View More Questions
Concepts Used:
Group 1 Elements
Group one of alkali metals is s-block elements with just one electron in their s-orbital. They are are alkali metals. They are named so because of the alkaline nature of the hydroxides and oxides.
Alkali metals are characterized by one s-electron in the valence shell of their atoms.
Alkali metals have a corresponding [Noble gas] ns1 electronic configuration. They occupy the first column of the periodic table. Alkali elements are:
- Lithium(Li)
- Sodium(Na)
- Potassium (K)
- Rubidium (Ru)
- Cesium (Cs)
- Francium (Fr)
They have occupied successive periods from first to seven. Francium is a radioactive element with very low half-life.
Electronic Configuration:
- Alkali metals have one electron in their valence shell.
- The electronic configuration is given by ns1. For example, the electronic configuration of lithium is given by 1ns1 2ns1.
- They tend to lose the outer shell electron to form cations with charge +1 (monovalent ions).
This makes them the most electropositive elements and due to the same reason, they are not found in the pure state.
SUBSCRIBE TO OUR NEWS LETTER
COLLEGE NOTIFICATIONSEXAM NOTIFICATIONSNEWS UPDATES
Download the Collegedunia app on 
© 2024 Collegedunia Web Pvt. Ltd. All Rights Reserved