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s-Block Elements

Main 2022ChemistrySingle correct
Which of the following statement is incorrect ?
Main 2022ChemistrySingle correct
Statement I : An alloy of lithium and magnesium is used to make aircraft plates.

Statement II : The magnesium ions are important for cell-membrane integrity.

In the light the above statements, choose the correct answer from the options given below
Main 2022ChemistrySingle correct
Lithium nitrate and sodium nitrate, when heated separately, respectively, give :
Main 2022ChemistrySingle correct
Portland cement contains 'X' to enhance the setting time. What is 'X'?
Main 2021ChemistryInteger
Number of amphoteric compounds among the following is _______.

(A) BeO (B) BaO (C) Be(OH) $_2$ (D) Sr(OH) $_2$
Advanced 2020ChemistrySingle correct
Which of the following liberates $\ce{O2}$ upon hydrolysis?
Main 2017ChemistrySingle correct
Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :
Main 2017ChemistrySingle correct
Consider the following ionization enthalpies of two elements 'A' and 'B'.

Element 1 $^{\text{st}}$ (kJ/mol) 2 $^{\text{nd}}$ (kJ/mol) 3 $^{\text{rd}}$ (kJ/mol)

A 899 1757 14847

B 737 1450 7731

Which of the following statements is correct ?
Main 2017ChemistrySingle correct
A metal 'M' reacts with nitrogen gas to afford ' $\ce{M3N}$ '. ' $\ce{M3N}$ ' on heating at high temperature gives back 'M' and on reaction with water produces a gas 'B'. Gas 'B' reacts with aqueous solution of $\ce{CuSO4}$ to form a deep blue compound. 'M' and 'B' respectively are :
Main 2017ChemistrySingle correct
Which one of the following is an oxide ?
Main 2016ChemistrySingle correct
The main oxides formed on combustion of Li, Na and K in excess of air are, respectively :
Main 2016ChemistrySingle correct
The correct order of the solubility of alkaline-earth metal sulphates in water is :
Main 2016ChemistrySingle correct
The commercial name for calcium oxide is :
Main 2015ChemistrySingle correct
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?
Main 2015ChemistrySingle correct
The correct order of thermal stability of hydroxides is :
Main 2015ChemistrySingle correct
Which of the alkaline earth metal halides given below is essentially covalent in nature ?
Advanced 2014ChemistryMultiple correct
The pair(s) of reagents that yield paramagnetic species is/are
Main 2014ChemistrySingle correct
Which of the following statements about $\ce{Na2O2}$ is not correct ?
Advanced 2009ChemistryMultiple correct
The compound(s) formed upon combustion of sodium metal in excess air is(are)
Advanced 2007ChemistryAssertion and reason
STATEMENT-1: Alkali metals dissolve in liquid ammonia to give blue solutions.

because

STATEMENT-2: Alkali metals in liquid ammonia give solvated species of the type $\ce{[M(NH3)_n]+}$ (M = alkali metals).

Element	1 $^{\text{st}}$ (kJ/mol)	2 $^{\text{nd}}$ (kJ/mol)	3 $^{\text{rd}}$ (kJ/mol)
A	899	1757	14847
B	737	1450	7731

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