Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main 202127 AugustEvening Shift

Exam: JEE Main
Year: 2021
Date: 27 August
Shift: Evening Shift
Subject: Chemistry
Chapter: s Block Elements

JEE Main 2021 · 27 August · Evening Shift · Chemistry · s Block Elements

Choose the correct statement from the following :

Choose the correct statement from the following :

Options

A $LiF$ has least negative standard enthalpy of formation among alkali metal fluorides.
BThe standard enthalpy of formation for alkali metal bromides becomes less negative on descending the group.
CThe low solubility of $CsI$ in water is due to its high lattice enthalpy.
DAmong the alkali metal halides, $LiF$ is least soluble in water.

Correct answer

D. Among the alkali metal halides, $LiF$ is least soluble in water.

Step-by-step solution

( 3 )

CsI

has less lattice enthalpy. But due to less hydration enthalpy of

{Cs}^{+}

ion it is less soluble.

( 4 )

LiF

is least soluble in water.

Practice s Block Elements on Quantrex Academy →

More from s Block Elements

First and second ionization enthalpies of lithium are 520 kJ mol ^ -1 and 7297 kJ mol ^… JEE Main 2026 The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides… JEE Main 2026 Given below are two statements: One is labelled as Assertion A and the other is labelled… JEE Main 2023 Be ( OH ) _ 2 reacts with Sr ( OH ) _ 2 to yield an ionic salt. Choose the incorrect… JEE Main 2023 In the given reaction cycle X, Y and Z respectively are JEE Main 2023 The density of alkali metals is in the order JEE Main 2023 Alkali metal from the following with least melting point is JEE Main 2023 Mg ( NO _ 3 ) _ 2 . XH _ 2 O and Ba ( NO _ 3 ) _ 2 . YH _ 2 O , represent formula of the… JEE Main 2023 Full s Block Elements list All JEE Main PYQs