Home
Class 11
CHEMISTRY
Which of the reaction is not feasible?...

Which of the reaction is not feasible?

A

`HC-=CNa+CH_3OHto`

B

`HC-=CH+CH_3Lito`

C

`HC-=CH+NaHto`

D

`HC-=CH+NaCNto`

Text Solution

Verified by Experts

The correct Answer is:
D
These are acid-base reactions. Acid-base reactions always go from the stronger acids and bases to the weaker ones. Therefore, actylene (an acid) will only react with bases that are converted to acids weaker than acetylene, and acetylide ion (a base) will only react with acids that are converted to bases weaker than acetylide ion:
`HCNgtCH_3OHgtC_2H_2gtH_2=CH_4`
`underset("Stronger base")(HC-=CNa)+underset("Stronger acid")(CH_3OH)tounderset("weaker acid")(CH-=CH)+underset("Weaker base")(CH_3ONa)`
`underset("Stronger acid")(HC-=CH)+underset("Stronger base")(CH_3Li)tounderset("Weaker base")(HC-=CLi)+underset("Weaker acid")(CH_4)`
`underset("Stronger acid")(HC-=CH)+underset("stronger base")(NaH)tounderset("Weaker base")(HC-=CNa)+underset("Weaker acid")(H_2)`
`HC-=CH+NaCNto` No reaction.
HCN is a stronger acid than acetylene, thus, weaker acid acetylene cannot displace stronger acid HCN from its salt.
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A reaction is not feasible if

Methanol can be synthesised in the gas phase from methane and steam as shown in the reactions below: Which of these reactions is/are feasible at 960 K?

Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E^(@) values : Fe^(3+)//Fe^(2+)=+0.77, I_(2)//I^(-)=+0.54 V Cu^(2+)//Cu= + 0.34 V, Ag^(+)//Ag= +0.80 V

Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E^(θ) values: Fe^(3+)//Fe^(2+)=0.77, I_(2)//I^(-)=+0.54 , Cu^(2+)//Cu=+0.34, Ag^(+)//Ag=+0.80V