Magnetic Effect and Field Strength Quiz

Questions and Answers

Electric charge

Varies inversely with the square of the distance

Iron

A reaction where two or more elements combine to form a single compound Signup and view all the answers

2CO + O2 → 2CO2 Signup and view all the answers

Because they involve the release of heat when the bond forms between reactants Signup and view all the answers

They form barium fluoride in an exothermic reaction Signup and view all the answers

Magnesium carbonate Signup and view all the answers

Direct combination reaction Signup and view all the answers

Combination reaction Signup and view all the answers

Lithium sulfide Signup and view all the answers

Magnesium oxide Signup and view all the answers

It is an unstable free radical Signup and view all the answers

Hydrogen reacting with oxygen to form water Signup and view all the answers

Calcium hydroxide Signup and view all the answers

Combination reaction Signup and view all the answers

Hydrochloric acid Signup and view all the answers

$H_2O$ and heat Signup and view all the answers

It is an unstable free radical Signup and view all the answers

The magnetic effect occurs due to the presence of magnetic fields, which are strongest in ferromagnetic materials such as iron, nickel, and cobalt.
The strength of a magnetic field decreases with distance, following the inverse square law.

A direct combination reaction, also known as a synthesis reaction, is a type of reaction where two or more reactants combine to form a single product.
Examples of combination reactions include:
- Barium metal (Ba) + Fluorine gas (F2) → Barium fluoride (BaF2)
- Magnesium oxide (MgO) + Carbon dioxide (CO2) → Magnesium carbonate (MgCO3)
Combination reactions are usually exothermic, meaning they release heat energy.
Types of combination reactions include:
- Elemental combination reactions, where two elements combine to form a compound (e.g., Lithium + Sulfur → Lithium sulfide)
- Metal-nonmetal combination reactions, where a metal combines with a non-metal (e.g., Iron + Sulfur → Iron(II) sulfide)
When magnesium burns in air, it forms magnesium oxide (MgO).
Elemental oxygen (O) is not commonly used in chemical reactions under natural conditions due to its reactive nature.
Iron(III) oxide is formed through the reaction of iron with oxygen, not elemental oxygen.
Calcium oxide (CaO) reacts with water (H2O) to form calcium hydroxide (Ca(OH)2).
Iron combines with sulfur to form Iron(II) sulfide (FeS).
Hydrogen reacts with chlorine to form hydrogen chloride (HCl).
The products of the combustion of hydrogen are water (H2O) and heat energy.