List of top Chemistry Questions on GROUP 1 ELEMENTS

The compound which does not exist.

Read the following two statements
Statement I: Ionic radius of Li+ is greater than Mg++
Statement II: Lithium and magnesium can't form superoxide

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:

In which form does \(BeCl_{2}\) exist in the solid state, vapor state and high temperature?

Which of the following statement is incorrect?

Choose the correct order of density of the alkali metals :

Among the statements (A)-(D), the correct ones are : (a) Lithium has the highest hydration enthalpy among the alkali metals. (b) Lithium chloride is insoluble in pyridine. (c) Lithium cannot form ethynide upon its reaction with ethyne. (d) Both lithium and magnesium react slowly with $H_2O$ .

HCl was passed through a solution of $CaCl_2$,$MgCl_2$ and $NaCl$. Which of the following compound(s) crystallise(s)?

The metal that forms nitride by reacting directly with $N_2$ of air, is :

The correct order of hydration enthalpies of alkali metal ions is -

The amphoteric hydroxide is :

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:

What is the colour of the flame on heating potassium in the flame of a Bunsen burner?

Which of the following is an amphoteric hydroxide ?

Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:

Which alkali metal during flame test will show colour corresponding to maximum wavelength?

Which of the following is not correct ?

In $KO_2$, the nature of oxygen species and the oxidation state of oxygen atom are, respectively :

Dead burnt plaster is

The INCORRECT statement is :

Magnesium reacts with an element $(X)$ to form an ionic compound. If the ground state electronic configuration of $( X )$ is $1 s ^{2} 2 s ^{2} 2 p ^{3}$, the simplest formula for this compound is