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s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - JEE MCQ


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30 Questions MCQ Test - s-Block Elements (Alkali and Alkaline Earth Metals) - 1

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s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 1

An alkaline earth metal (M) gives a salt with chlorine, which is soluble in water at room temperature. It also forms an insoluble sulphate whose mixture with a sulphide of a transition metal is called `lithopone'-a white pigment. Metal M is-

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 1

Lithopane is (BaSO4 + ZnS)
white pigment
BaSO4 is insoluble in water

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 2

The hydroxide of alkaline earth metal, which has the lowest value of solubility product (Ksp) at normal temperature (25°C) is-

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 2

Be(OH)2 down the group solubility increase

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s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 3

Which of the following carbonate of alkali metals has the least thermal stability ?

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 3

T.S ∞ Ionic character (for polyatomic anion)
Li2CO3 is least ionic or most covalent

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 4

The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of LiF in water is due to

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 4

K2O,    KO2,  K2O2
Rb2O,   RbO2,   Rb2O2
Na, Li from normal oxide

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 5

The formula of soda ash is

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 5

Soda ash is Na2CO3.

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 6

The golden yellow colour associated with NaCl to Bunsen flame can be explained on the basis of -

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 6

In frame test thermal excitation deexcitation takes place in cation with low Ionisation potential

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 7

The order of solubility of lithium halides in non polar solvents follows the order.

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 7

As the size of the anion increases from  to , the covalent character increase and hence the solubility in non-polar solvent increases. 

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 8

CsBr3 contains -?

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 8

Cs is highly electropositive & forms ionic bond with Cs+ cation.

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 9

The correct order of solubility is -?

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 9

Evident from Fajan rule

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 10

When K2O is added to water, the solution becomes basic in nature because it contains a significant concentration of -

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 10

K2O + H2O → KOH

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 11


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 11


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 12


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 12


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 13


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 13


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 14


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 14


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 15


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 15


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 16


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 16


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 17


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 17


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 18


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 18


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 19

Which of the following is incorrect for sodium peroxide ?

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 19


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 20


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 20


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 21

A metal [X] on heating in nitrogen gas gives [Y].[Y] on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a blue colour. [Y] is

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 21


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 22


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 22


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 23

Which is not correctly matched ?

(1) Basic strength of oxides     Cs2O< />2O< K2O < Na2O < Li2O

(2) Stability of peroxides    Na2O2 < K2O2 < Rb2O2 < Cs2O2

(3) Stability of bicarbonates    LiHCO3 < NaHCO3 < KHCO3 < RbHCO3 < CsHCO3

(4) Melting point    NaF < NaCl < NaBr < NaI

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 23

Basic strength of the oxides increase in the order Li2O < Na2O < K2O < Rb2O < Cs2O. The increase in basic strength is due to the decrease in I.E. down the group.

The melting point of the halides decrease in the order NaF < NaCl < NaBr < NaI, because of the decrease in lattice energies, as the size of the halide ion increases.

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 24


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 24


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 25

The set representing the correct order of first ionization potential is

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 25

Down the group size of atoms increases, therefore, the distance between the nucleus and the valence electron to be removed increases. So the attraction between nucleus and that electron decreases. Hence the ionization potential decreases down the group.

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 26

The ionization enthalpies of the alkali metals decrease down the group from Li to Cs because :

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 27


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 27


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 28


Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 28


s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 29

Which of the follownig acids will not evolve H2 gas on reaction with alkali metals

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 29

None of the acids evolve H2 gas with alkali metals.

s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 30

The first four ionization potentials (eV) are given for two elements X and Y. Identify them.

X : 8.296, 25.149, 37.92, 259.298

Y : 5.318, 47.29, 71.65, 98.88

Detailed Solution for s-Block Elements (Alkali and Alkaline Earth Metals) - 1 - Question 30

in X, IVth I.P. is very large & in Y second I.P. is very large

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