Question

How many carbons are there in ${\left( {C{H_3}} \right)_2}CHOH$ ?

Answer 1

Hint : The IUPAC name of ${\left( {C{H_3}} \right)_2}CHOH$ which is Isopropyl alcohol is $propan - 2 - ol$ . It is also known as isopropanol or $2 - propanol$ . Isopropanol is a flammable, colourless liquid with a powerful odour. Water and certain organic solvents, such as ethanol, methanol, chloroform, and acetone, are miscible. Rubbing alcohol, which is $70 - 90$ percent isopropanol, is widely available to the general public.

Complete Step By Step Answer:
${\left( {C{H_3}} \right)_2}CHOH$ can also be written as ${C_3}{H_7}OH$
${C_3}{H_7}OH$ is the molecular formula for Isopropanol which is also known as Isopropyl alcohol. There are $3$ carbon atoms in isopropanol.
${C_4}{H_9}OH$ is the molecular formula for Butanol. There are $4$ carbon atoms in butanol.
${C_5}{H_{11}}OH$ is the molecular formula for Pentanol. There are $5$ carbon atoms in pentanol.
We simply add a methylene group $(C{H_2})$ to extend the carbon chain.

Additional Information:
Since isopropyl alcohol is easily absorbed through the skin, spilling large quantities on the skin may result in poisoning. Small amounts of isopropyl alcohol on the skin are usually not harmful, but prolonged exposure can result in itching, redness, rash, drying, and cracking. Corrosion can be caused by prolonged skin contact.

Note :
As a rubbing-alcohol antiseptic, isopropyl alcohol is mixed with water. It's also used in cosmetics like aftershave lotions and hand lotions. In industry, it's used to denature ethanol and as a cheap solvent for cosmetics, medications, shellacs, and gums (ethyl alcohol).
Isopropyl alcohol is rapidly antimicrobial against bacteria, fungi, and viruses in solutions containing $60$ to $90$ percent alcohol and $10$ to $40$ percent purified water. As alcohol concentrations fall below $50\%$ , the disinfectant's efficacy deteriorates.