Explanation

The SN1 reaction mechanism involves the formation of a carbocation intermediate, which is favored by the presence of a good leaving group and a stable carbocation.

None of the options listed (toluene, nitrobenzene, or benzoic acid) are typically associated with undergoing SN1 reactions 

Explanation

When hydrogen sulfide (H2S) reacts with sulfur dioxide (SO2), the reaction produces sulfur (S) and water (H2O).

2H2​S+SO2​→3S+2H2​O

• Reactants: Hydrogen sulfide (H₂S) and Sulfur dioxide (SO₂)

• Products: Elemental Sulfur (S) and Water (H₂O)

  
  

Explanation

When alkalis react with fats, they produce soap and glycerin in a process called saponification.

Glycerin (also called glycerol) is a byproduct formed alongside soap.

Explanation

Smog is caused by pollutants like sulfur dioxide (SO₂) and nitrogen oxides (NOₓ), which are released from burning fossil fuels (coal, oil, and gas).

These pollutants react with sunlight to form ground-level ozone and particulate matter, leading to smog formation.

Explanation

The periodic table, also known as the periodic table of elements, is an organized arrangement of chemical elements into rows (periods) and columns (groups).

The periodic table shows trends in element properties, such as:

• Metallic character: Increases down a group and from right to left across a period.
• Nonmetallic character: Increases from the bottom left to the top right of the table.

Explanation

Isotones are elements or isotopes that have the same number of neutrons but different numbers of protons.

For example, 

14N and 15 O are isotones because they both have 7 neutrons, but different numbers of protons.

Explanation

• Nitrogen (N2) makes up about 78% of the Earth's atmosphere.
• Making it the most abundant gas in the atmosphere.

Explanation

Phosphorus is used in the match industry, particularly red phosphorus.

It is a key component in the production of matchsticks.

It is highly reactive and helps ignite the match when struck.

Explanation

In a single displacement reaction, one element replaces another in a compound.

Here, C replaces B in the compound AB, forming A + BC.

Explanation

Electrons are lost in an oxidation reaction.

Oxidation simply means a gain of oxygen and an oxidizing agent is a substance that oxidizes something.

The reduction is the gain of electrons