# Balbharati solutions for Chemistry 11th Standard Maharashtra State Board chapter 8 - Elements of Group 1 and 2 [Latest edition]

## Chapter 8: Elements of Group 1 and 2

Exercises
Exercises [Page 122]

### Balbharati solutions for Chemistry 11th Standard Maharashtra State Board Chapter 8 Elements of Group 1 and 2 Exercises [Page 122]

Exercises | Q 1. (A) | Page 122

Explain the following.

Hydrogen shows similarity with alkali metals as well as halogens.

Exercises | Q 1. (B) | Page 122

Explain the following.

Standard reduction potential of alkali metals have high negative values.

Exercises | Q 1. (C) | Page 122

Explain the following.

Alkaline earth metals have low values of electronegativity; which decreases down the group.

Exercises | Q 1. (D) | Page 122

Explain the following.

Sodium dissolves in liquid ammonia to form a solution which shows electrical conductivity.

Exercises | Q 1. (E) | Page 122

Explain the following.

BeCl2 is covalent while MgCl2 is ionic.

Exercises | Q 1. (F) | Page 122

Explain the following.

Lithium floats and water while sodium floats and catches fire when put in water.

Exercises | Q 2. (A) | Page 122

Write a balanced chemical equation for the following.

$\ce{CO2}$ is passed into a concentrated solution of NaCl, which is saturated with $\ce{NH3}$.

Exercises | Q 2. (B) | Page 122

Write a balanced chemical equation for the following.

A 50% solution of sulphuric acid is subjected to electrolyte oxidation and the product is hydrolysed.

Exercises | Q 2. (C) | Page 122

Write a balanced chemical equation for the following.

Magnesium is heated in air.

Exercises | Q 2. (D) | Page 122

Write a balanced chemical equation for the following.

Beryllium oxide is treated separately with aqueous HCl and aqueous NaOH solutions.

Exercises | Q 3. (A) | Page 122

Describe the diagonal relationship between Li and Mg with the help of two illustrative properties.

Exercises | Q 3. (B) | Page 122

Outline the industrial production of dihydrogen from steam. Also, write the chemical reaction involved.

Exercises | Q 3. (C) | Page 122

A water sample, which did not give lather with soap, was found to contain $\ce{Ca(HCO3)2}$ and $\ce{Mg(HCO3)2}$. Which chemical will make this water give lather with soap? Explain with the help of chemical reactions.

Exercises | Q 3. (D) | Page 122

Name the isotopes of hydrogen. Write their atomic composition schematically and explain which of these is radioactive?

Exercises | Q 4. (A) | Page 122

Name the following.

Alkali metal with smallest atom.

Exercises | Q 4. (B) | Page 122

Name the following.

The most abundant element in the universe.

Exercises | Q 4. (C) | Page 122

Name the following.

Exercises | Q 4. (D) | Page 122

Name the following.

Ions having high concentration in cell sap.

Exercises | Q 4. (E) | Page 122

Name the following.

A compound having hydrogen, aluminium, and lithium as its constituent elements.

Exercises | Q 5. (A) | Page 122

Choose the correct option.

The unstable isotope of hydrogen is _________

• H-1

• H-2

• H-3

• all the three

Exercises | Q 5. (B) | Page 122

Choose the correct option.

Identify the odd one.

• Rb

• Ra

• Sr

• Be

Exercises | Q 5. (C) | Page 122

Choose the correct option.

Which of the following is Lewis acid?

• BaCl2

• KCl

• BeCl2

• LiCl

Exercises | Q 5. (D) | Page 122

Choose the correct option.

What happens when crystalline Na2CO3 is heated?

• releases CO2

• loses H2O

• decomposes in NaHCO3

• no change taken place

Exercises

## Balbharati solutions for Chemistry 11th Standard Maharashtra State Board chapter 8 - Elements of Group 1 and 2

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Concepts covered in Chemistry 11th Standard Maharashtra State Board chapter 8 Elements of Group 1 and 2 are Hydrogen, Alkali Metals and Elements of Group 2, Some Important Compounds of Elements of S-block.

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