Main Group Elements: Properties, Reactions, and Significance

Question 1

Which of the following is NOT characteristic of s-block elements?

Accepted Answer

Form stable oxides

Answer

High reactivity

Answer

Low ionization energy

Answer

Powerful reducing agents

Question 2

Which of the following is classified as a transition metal?

Accepted Answer

Chromium

Answer

Sodium

Answer

Aluminum

Answer

Bromine

Question 3

What is the coordination number of the metal ion in [Fe(CN)6]^4-

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 4

What is the hybridization of the carbon atom in methane?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Answer

sp3d

Question 5

In the periodic table, main group elements primarily occupy which blocks?

Accepted Answer

s-block and p-block

Answer

s-block only

Answer

p-block only

Answer

s-block, p-block, and d-block

Question 6

Which element among the following belongs to Group 1 (Alkali metals)?

Accepted Answer

Sodium

Answer

Magnesium

Answer

Phosphorus

Answer

Chlorine

Question 7

Which noble gas finds application in lighting devices?

Accepted Answer

Neon

Answer

Helium

Answer

Argon

Answer

Krypton

Question 8

Which oxide exhibits an acidic nature?

Accepted Answer

Carbon dioxide

Answer

Sodium oxide

Answer

Magnesium oxide

Answer

Potassium oxide

Question 9

Identify the element that demonstrates variable oxidation states:

Accepted Answer

Nitrogen

Answer

Oxygen

Answer

Fluorine

Answer

Neon

Question 10

Which reaction below represents the disproportionation of an element?

Accepted Answer

2HgO → 2Hg + O2

Answer

2Cu(OH)2 → CuO + Cu(OH)2 + 2H2O

Answer

2NH3 + 3Cl2 → N2 + 6HCl

Answer

2Na + 2H2O → 2NaOH + H2

Question 11

Identify the strong oxidizing agent among the following:

Accepted Answer

Potassium permanganate

Answer

Sodium chloride

Answer

Hydrogen peroxide

Answer

Water

Question 12

Which element below is not classified as a noble gas?

Accepted Answer

Oxygen

Answer

Helium

Answer

Neon

Answer

Argon

Question 13

Which element finds application in the production of semiconductors?

Accepted Answer

Silicon

Answer

Carbon

Answer

Aluminium

Answer

Iron

Question 14

Which substance is a Lewis acid?

Accepted Answer

Boron trifluoride

Answer

Ammonia

Answer

Water

Answer

Sodium hydroxide

Question 15

Which main group element has the highest electronegativity?

Accepted Answer

Fluorine

Answer

Sodium

Answer

Nitrogen

Answer

Chlorine

Question 16

As you move down an alkali metal group, the reactivity of the elements:

Accepted Answer

Increases

Answer

Decreases

Answer

Remains the same

Answer

Alternates between increasing and decreasing

Question 17

Which of the following main group elements is known for exhibiting variable oxidation states?

Accepted Answer

Manganese

Answer

Potassium

Answer

Magnesium

Answer

Sodium

Question 18

Covalent bonds are typically found between:

Accepted Answer

Non-metals

Answer

Metals

Answer

Metalloids

Answer

Noble gases

Question 19

The measure of an element's ability to attract electrons in a chemical bond is called:

Accepted Answer

Electronegativity

Answer

Ionization energy

Answer

Atomic radius

Answer

Electron affinity

Question 20

Which of the following elements belongs to the alkali metal group?

Accepted Answer

Lithium

Answer

Boron

Answer

Oxygen

Answer

Carbon