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Daily Practice Problems
Class 11 Chemistry
The s-Block Elements
daily practice problem

Question1.

Formula of Quick lime & Slaked lime is __________ & __________ respectively.

1) CaCO3, Ca(OH)2

2) CaO, Ca(OH)2

3) Ca(OH)2, CaO

4) CaO, CaCO3

Question2.

Which of following decomposes on heating to give Metal Oxide, NO2 & O2?

1) KNO3

2) CsNO3

3) NaNO3

4) LiNO3

Question3.

State uses of Li.

Question4.

Which of the following alkali metal has melting point below 30°C?

1) K

2) Na

3) Cs

4) Rb

Question5.

Write the reaction of preparation of 

(i) BeCl2 from BeO.

(ii) BeH2 from BeCl2

Question6.

The order of increasing ionisation enthalpy in alkali metals is

(i) Na > Li > K > Rb > Cs

(ii) Cs < Rb < K < Na < Li

(iii) Li > Na > K > Rb > Cs

(iv) K < Li < Na < Rb < Cs

Question7.

The increasing order of hydration enthalpies of alkali metal ions is

1) Li+ < Na+ < K+ < Rb+ < Cs+

2) Cs+ < Rb+ < K+ < Na+ < Li+

3) Cs+ < K+ < Rb+ < Na+ < Li+

4) Li+ < K+ < Na+< Rb+ < Cs+

Question8.

Give similarities in properties between Beryllium & Aluminium.

Question9.

Arrange the following alkaline earth metal hydroxides in their increasing order of solubility in water?

Be(OH)2, Ca(OH)2, Sr(OH)2, Mg(OH)2, Ba(OH)2 

Question10.

Arrange the following alkaline earth metal sulphates in their increasing order of solubility in water?

CaSO4, BeSO4, SrSO4, BaSO4, MgSO4

Question11.

State the uses of Mg & Ra.

Question12.

How is Sodium hydrogencarbonate prepared?

Question13.

Why gypsum is added during of setting of cement?

Question14.

What is cement clinker?

Question15.

Complete the following reactions:

Li2O + H2O →

Na2O2 + H2O →

KO2 + H2O →

Question16.

Na, Ca & Ba impart colours ______, ______, & _______ respectively to the flame.

1) Yellow, Apple green, Brick red

2) Brick red, Yellow, Apple green

3) Yellow, Brick red, Apple green

4) Apple green, Brick red, Yellow

Question17.

Why MgCl2 and CaCl2 exist as MgCl2.6H2O and CaCl2· 6H2O while NaCl and KCl do not form such hydrates?

Question18.

Aqueous solution of slaked lime is known as

(i) lime water

(ii) quick lime

(iii) milk of lime

(iv) slaked lime

Question19.

The main pigment for the absorption of light in plants is chlorophyll which contains

1) Ca

2) Na

3) Mg

4) K

Question20.

How is Plaster of Paris prepared?        

                                                            ***********

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All About Daily Practice Problems on Class 11 Chemistry The s-Block Elements NCERT Chapter

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