Question

Environment friendly refrigerant $R134a$ is used in the new generation domestic refrigerators. Its chemical formula is

• A. $CHCl{F}_2$
• B. $C_{2}C{l}_3{F}_3$
• C. $C_{2}C{l}_2{F}_4$
• D. $C_2{H}_2{F}_4$

Answer 1

The correct option is D $C_2{H}_2{F}_4$

Number of carbon atoms
= 1st digit +1
=1+1 = 2

Number of hydrogen atoms
= 2nd digit -1
=3-1 = 2

Number of fluorine atoms
= 3rd digit
=4

So, its chemical formuls is $C_2{H}_2{F}_4$