CBSE Class 11 Chemistry The S Block Elements Worksheet Set B

The S Block Elements MCQ Questions with Answers Class 11 Chemistry

Question- Which of the following represents a correct sequence of reducing power of the following elements?

(a) Li > Cs > Rb

(b) Rb > Cs > Li

(c) Cs > Li > Rb

(d) Li > Rb > Cs

Answer-(a)

Question-Na metal is stored in

(a) C₆H₆

(b) kerosene

(c) alcohol

(d) toluene

Answer-(b)

Question-Why lithium react less vigorously with water than other alkali metals?

(a) Lithium has most negative E value

(b) Lithium has small size and very high hydration energy.

(c) Lithium has least negative E value

(d) Both (a) and (b)

Answer-(b)

Question-Which of the following metal is used as a coolant in breeder nuclear reactors?

(a) Potassium

(b) Sodium

(c) Caesium

(d) Rubidium

Answer-(b)

Question- Washing soda has formula

(a) Na₂CO₃.7H₂O

(b) Na₂CO₃.10H₂O

(c) Na₂CO₃.3H₂O

(d) Na₂CO₃

Answer-(b)

Question- Which compound will show the highest lattice energy ?

(a) RbF

(b) CsF

(c) NaF

(d) KF

Answer-(c)

Question-In Solvay ammonia process, sodium bicarbonate is precipitate due to

(a) presence of NH₃

(b) reaction with CO₂

(c) reaction with brine solution

(d) reaction with NaOH

Answer-(c)

Question- In crystals which one of the following ionic compounds would you expect maximum distance between centres of cations and anions?

(a) LiF

(b) CsF

(c) CsI

(d) LiI

Answer-(c)

Question-The products obtained on heating LiNO2 will be

(a) Li₂O+ NO₂ +O₂

(b) Li₃N + O₂

(c) Li₂O+ NO+ O₂

(d) LiNO₃ + O₂

Answer-(a)

Question-What is the colour of solution of alkali metals in liquid ammonia?

(a) Bronze

(b) Blue

(c) Green

(d) Violet

Answer-(b)

Question-On heating anhydrous Na₂CO₃,.......is evolved

(a) CO₂

(b) water vapour

(c) CO

(d) no gas

Answer-(d)

Question-Which of the following metal is used along with lithium to make the alloy named ‘white metal’ ?

(a) Nickel

(b) Aluminium

(c) Silver

(d) Lead

Answer-(d)

Question-Which of the following does not illustrate the anomalous properties of lithium?

(a) The melting point and boiling point of Li are comparatively high

(b) Li is much softer than the other group I metals

(c) Li forms a nitride Li3N unlike group I metals

(d) The ion of Li and its compounds are more heavily hydrated than those of the rest of the group

Answer-(b)

Question-Which is most basic in character ?

(a) CsOH

(b) KOH

(c) NaOH

(d) LiOH

Answer-(a)

Question- Identify the correct statement

(a) Elemental sodium can be prepared and isolated by electrolysing an aqueous solution of sodium chloride

(b) Elemental sodium is a strong oxidising agent

(c) Elemental sodium is insoluble in ammonia

(d) Elemental sodium is easily oxidised

Answer-(d)

Question- Among LiI, NaI, KI, the one which is more ionic and more soluble in water is

(a) KI

(b) NaI

(c) LiI

(d) None of these

Answer-(a)

Question-The process associated with sodium carbonate manufacture is known as

(a) Chamber

(b) Haber

(c) LeBlanc

(d) Castner

Answer-(c)

More Question

Instructions:

1. All questions are compulsory.

2. Please give the explanation for the answer where applicable.

Q1 - What is the general electronic configuration of the outermost shell of alkali metals? 

Q2 - What are the main sources of lithium? 

Q3 - Which alkaline earth metal forms covalent compound? 

Q4 - Alkali metals and their salts give characteristic colour of the flame. Explain? 

Q5 - A piece of burning magnesium ribbon continues to burn in SO₂.why? 

Q6 - Beryllium and Magnesium do not give colour to the flame why?

Q7 - When an alkali metal dissolves in liquid ammonia, the solution acquires different colours. Explain? 

Q8 - Comment on the following:

i) KO₂ is paramagnetic.

ii) BeO is insoluble but BeSO₄ is soluble in water.

iii) Lithium is the only alkali metal which forms nitride directly.

Q9 - Discuss the position of alkali metals in the periodic table. Also discuss the trends in some important atomic and physical properties in the group. 

Please refer to the link below for CBSE Class 11 Chemistry The S Block Elements Worksheet Set B