Which of the following will have the highest boiling point? (a) Methanal (b) Ethanal (c) Propanal (d) Butanal

Which of the following will have the highest boiling point?
(a) Methanal
(b) Ethanal
(c) Propanal
(d) Butanal
by

1 Answer

Answer :

Butanal
by

Related questions

On reduction with LiAlH4, which of the following compounds could yield an optically active compound? (a) Propanal (b) Propanone (c) Butanal (d) Butanone

Description : On reduction with LiAlH4, which of the following compounds could yield an optically active compound? (a) Propanal (b) Propanone (c) Butanal (d) Butanone

Last Answer : Butanone

An unknown compound gave a positive Tollens' test. Treatment of the unknown with I2/NaOH gave a solid which was identified as iodoform. The unknown was? (a) Ethanal (b) Acetone (c) Propanal (d) Acetophenone

Description : An unknown compound gave a positive Tollens' test. Treatment of the unknown with I2/NaOH gave a solid which was identified as iodoform. The unknown was? (a) Ethanal (b) Acetone (c) Propanal (d) Acetophenone

Last Answer : Ethanal

Suggest a reason for the large difference in the boiling points of butanol and butanal, although they have same solubility in water.

Description : Suggest a reason for the large difference in the boiling points of butanol and butanal, although they have same solubility in water.

Last Answer : The b. pt. of butanol is higher than that of butanal because butanol has strong intermolecular H-bonding while butanal has weak dipole-dipole interaction. However both of them form H-bonds with water and hence are soluble.

Why does methanal undergoes Cannizaro’s rxn ?

Description : Why does methanal undergoes Cannizaro’s rxn ?

Last Answer : Ans. Because it does not possesses hydrogen atom. Only those aldehydes can undergo  Cannizaro reaction which do not possess hydrogen atoms.

Why does methanal not give aldol condensation while ethanol gives ?

Description : Why does methanal not give aldol condensation while ethanol gives ? 

Last Answer : Ans. This is because only those compounds which have hydrogen atoms can undergo  aldol reaction. Ethanol possesses -hydrogen and undergoes aldol condensation.   Methanal has no hydrogen atoms, hence does not undergo aldol condensation. 

Acetic anhydride reacts with ethanal to give (a) Methyl acetate (b) Methyl propanoate (c) Ethyl acetate (d) Ethyl propanoate

Description : Acetic anhydride reacts with ethanal to give (a) Methyl acetate (b) Methyl propanoate (c) Ethyl acetate (d) Ethyl propanoate

Last Answer : Ethyl acetate

Acetic acid undergoes reduction with LiAlH4 to give (a) Ethanol (b) Ethane (c) Ethanal (d) Ethyne

Description : Acetic acid undergoes reduction with LiAlH4 to give (a) Ethanol (b) Ethane (c) Ethanal (d) Ethyne

Last Answer : Ethanol

Which of the following compounds does not give a positive iodoform test : (a) Ethanol (b) Ethanal (c) Methanol (d) Propanone

Description : Which of the following compounds does not give a positive iodoform test : (a) Ethanol (b) Ethanal (c) Methanol (d) Propanone

Last Answer : Methanol

The reaction of ethanal with one equivalent of methanol and a trace of an acid will give (a) Acetal (b) Hemiacetal (c) Ketal (d) Hemiketa

Description : The reaction of ethanal with one equivalent of methanol and a trace of an acid will give (a) Acetal (b) Hemiacetal (c) Ketal (d) Hemiketa

Last Answer : Hemiacetal

Diethyl ether reacts with sodium metal to give (a) Ethanol (b) Sodium ethoxide(c) Ethanal(d) Nothing happens

Description : Diethyl ether reacts with sodium metal to give (a) Ethanol (b) Sodium ethoxide (c) Ethanal (d) Nothing happens

Last Answer : Nothing happens

Ethanol is isomeric with (a) Dimethyl ether (b) Ethanal (c) Diethyl ether (d) Propanone

Description : Ethanol is isomeric with (a) Dimethyl ether (b) Ethanal (c) Diethyl ether (d) Propanone

Last Answer : Dimethyl ether

Would you expect benzaldehyde to be more reactive or less reactive in nucleophlic addition reaction than propanal ? Explain.

Description : Would you expect benzaldehyde to be more reactive or less reactive in nucleophlic addition reaction than propanal ? Explain.

Last Answer : C-atom of carbonyl group of benzaldehyde is less electrophilic than C-atom of carbonyl group in propanal. Polarity of carbonyl group is in benzaldehyde reduced due to resonance making it less ... group in it is more than in benzaldehyde. This makes propanal more reactive than benzaldehyde. 

Which of the following compounds yields a yellow precipitate when warmed with a mixture of iodine in aqueous sodium hydroxide? (a) Acetophenone (b) Benzaldehyde(c) Benzophenone(d) Propanal

Description : Which of the following compounds yields a yellow precipitate when warmed with a mixture of iodine in aqueous sodium hydroxide? (a) Acetophenone (b) Benzaldehyde (c) Benzophenone (d) Propanal

Last Answer : Acetophenone

2,2-Dichloropropane reacts with aqueous KOH to give (a) 2,2-Propanediol (b) Propanal (c) Acetone (d) Propene

Description : 2,2-Dichloropropane reacts with aqueous KOH to give (a) 2,2-Propanediol (b) Propanal (c) Acetone (d) Propene

Last Answer : Acetone

How many molecules are present in 3 moles of methanal?

Description : How many molecules are present in 3 moles of methanal?

Last Answer : 3 moles x 6.02x10^23 molecules/mole = 1.8x10^24 molecules

Is methanone the same as methanal?

Description : Is methanone the same as methanal?

Last Answer : Feel Free to Answer

How many molecules are present in 3 moles of methanal?

Description : How many molecules are present in 3 moles of methanal?

Last Answer : 3 moles x 6.02x10^23 molecules/mole = 1.8x10^24 molecules

Unconjugated bilirubin in serum is soluble in (A) Water (B) Alkalis (C) Acids (D) Methanal

Description : Unconjugated bilirubin in serum is soluble in (A) Water (B) Alkalis (C) Acids (D) Methanal

Last Answer : Answer : D

How do you Distinguish between ethanol and ethanal?

Description : How do you Distinguish between ethanol and ethanal?

Last Answer : Si9nce they are both colourless liquids - you would have to dochemical testing to distinguish which substance was which.

Identify the hydrocarbon which on ozonolysis gives :- (a) Only acetone (b) 1 equivalent of propanal + 1 equivalent of formaldehyde (c ) 1 equivalent o

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Description : An appropriate reagent for the conversion of 1-propanol to 1-propanal is

Last Answer : An appropriate reagent for the conversion of 1-propanol to 1-propanal is A. acidified potassium ... . pyrindium chlorochromate D. acidified `CrO_(3)`

What is the pH of propanal?

Description : What is the pH of propanal?

Last Answer : Propanal itself does not have a pH. This is because pH is onlyused for aqueous (water) solutions and propanal is not water. Ifadded to water, then the pH of that solution would be very slightlyacidic (

How willu obtain butan-2-ol from propanal?

Description : How willu obtain butan-2-ol from propanal?

Last Answer : What is the answer ?

What is the highest constant boiling point mixture ?

Description : What is the highest constant boiling point mixture ?

Last Answer : : The boiling point of a fixed boiling point mixture which is greater than the boiling point of each of its constituents is called the highest fixed boiling point mixture

Which of the following has highest boiling point and why?(L-II) (a) 2 methylpentane (b) 2,3 dimethyl butane (c) 2,2 dimythylbutane

Description : Which of the following has highest boiling point and why?(L-II) (a) 2 methylpentane (b) 2,3 dimethyl butane (c) 2,2 dimythylbutane

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Description : (a) What effect the branching of an alkane has on its melting point? (L-III) (b) Which of the following has highest boiling point?(L-III) (1) 2-methyl pentane. (2) 2, 3-diethyl butane. (3) 2, 2- dimethyl butane.

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The element with highest boiling point in the following is

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