E M B I B E

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 3

MEDIUM

JEE Advanced

IMPORTANT

Earn 100

Lithium is the smallest ion in group $1$ . It would therefore be expected to have the highest ionic mobility and hence solutions of its salts would be expected to have a higher conductivity than solutions of caesium salts. Explain why this is not true.

Important Questions on Group 1 - the Alkali Metals

EASY

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 4

Explain the reason for lithium having a greater tendency to form covalent compounds than the other elements in the group.

EASY

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 5

The atomic radius for lithium is

1.23 Å

. When the outermost

2 s

electron is ionized off, the ionic radius of

{Li}^{+}

is

0.76 Å

. Assuming that the difference in radii relates to the space occupied by the

2 s

electron, calculate what percentage of the volume of the lithium atom is occupied by the single valence electron. Is this assumption fair? (Volume of a sphere is

\frac{4}{3} {πr}^{3}

)

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 6

Explain why and how lithium resembles magnesium?

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 7

What are the products formed when each of the group

1

metals is burnt in dioxygen? How do these products react with water? Use the molecular orbital theory to explain the structure of the oxides formed by sodium and potassium.

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 8

Explain the difference in reactivity of group

1

metals with water.

MEDIUM

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 9

The ionization energies of group

1

elements suggest that caesium should be the most reactive, but the standard electrode potentials suggest that lithium is the most reactive. Reconcile these two observations.

EASY

JEE Advanced

IMPORTANT

Concise Inorganic Chemistry>Chapter 8 - Group 1 - the Alkali Metals>Exercise 1>Q 10

Describe how to make lithium hydride. Give equations to show any two important properties of lithium hydride. The compound contains the isoelectronic ions