The INCORRECT statement is :
- Lithium is least reactive with water among the alkali metals.
- $LiCl$ crystallises from aqueous solution as $\ce{LiCl.2H2O.}$
- Lithium is the strongest reducing agent among the alkali metals.
- $\ce{LiNO3}$ decomposes on heating to give $\ce{LiNO2}$ and $\ce{O2}$.
The Correct Option is D
Solution and Explanation
Top Questions on GROUP 1 ELEMENTS
- Thermal stability order of Group 1 hydroxides is:
- MHT CET - 2025
- Chemistry
- GROUP 1 ELEMENTS
- Alkali metal with highest first ionization enthalpy is:
- KEAM - 2025
- 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
- The compound which does not exist.
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
Ion having highest hydration enthalpy among the given alkaline earth metal ions is:
- JEE Main - 2023
- Chemistry
- GROUP 1 ELEMENTS
Questions Asked in JEE Main exam
The equivalent resistance between the points \(A\) and \(B\) in the given circuit is \[ \frac{x}{5}\,\Omega. \] Find the value of \(x\).
- JEE Main - 2026
- Current electricity
Method used for separation of mixture of products (B and C) obtained in the following reaction is:
- JEE Main - 2026
- p -Block Elements
- Consider light travelling from a medium A to medium B separated by a plane interface. If the light undergoes total internal reflection during its travel from medium A to B and the speed of light in media A and B are \(2.4 \times 10^8\) m/s and \(2.7 \times 10^8\) m/s, respectively, then the value of critical angle is :
- JEE Main - 2026
- Newtons Laws of Motion
In the following \(p\text{–}V\) diagram, the equation of state along the curved path is given by \[ (V-2)^2 = 4ap, \] where \(a\) is a constant. The total work done in the closed path is:
- JEE Main - 2026
- Thermodynamics
Let \( ABC \) be a triangle. Consider four points \( p_1, p_2, p_3, p_4 \) on the side \( AB \), five points \( p_5, p_6, p_7, p_8, p_9 \) on the side \( BC \), and four points \( p_{10}, p_{11}, p_{12}, p_{13} \) on the side \( AC \). None of these points is a vertex of the triangle \( ABC \). Then the total number of pentagons that can be formed by taking all the vertices from the points \( p_1, p_2, \ldots, p_{13} \) is ___________.
- JEE Main - 2026
- Coordinate Geometry
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.