Q. 583.5( 2 Votes )

Three organic compounds A, B and C have the following molecular formulae: A) C4H8O2
B) C4H10O
C) C4H8O
(a) Which compound contains an alcohol group? Write its name and structural formula.
(b) Which compound contains a carboxyl group? Write its name and structural formula.
(c) Which molecular formula can represent an aldehyde as well as a ketone? Write the names and structural formulae of the aldehyde and ketone represented by this molecular formula.

Answer :

(a) B; Butanol, C4H9OH

(b) A;Butanoic acid, C3H7COOH

(c) C; C4H8O Aldehyde: Butanal, C3H7CHO

Ketone: Butanone, CH3COCH2CH3

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PREVIOUSA hard material X which is mined from the earth is used as a household fuel and also for the generation of electricity at Thermal Power Stations. A soft material Y is also used as a fuel in the form of candles. A gaseous material Z which occurs along with petroleum is increasingly being used as a fuel in running vehicles in its compressed form. (a) What are materials, X, Y and Z? (b) When materials X, Y and Z are burned separately: (i) Which material burns by producing a yellow, luminous flame? (ii) Which material ultimately bums without producing a flame? (iii) Which material can bum in a gas stove by producing a blue flame?NEXTA colourless organic liquid X of molecular formula C2H4O2 turns blue litmus to red. Another colourless organic liquid Y of molecular formula C3H6O has no action on any litmus but it is used as a nail polish remover. A yet another colourless organic liquid Z of molecular formula C3H6O has also no action on litmus but it is used in tincture of iodine. (a) Name the liquid X. To which homologous series does it belong? Give the name of another member of this homologous series. (b) Name the liquid Y. To which homologous series does it belong? Write the name of another member of this homologous series. (c) Can you name an organic compound having the same molecular formula as liquid Y but which belongs to a different homologous series? What is this homologous series? (d) Name the liquid Z. To which homologous series does it belong? Write the name of another member of this homologous series.
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RELATED QUESTIONS :
How would you name the following compound?

CH3-CH2-BR

Lakhmir Singh & Manjit Kaur - Chemistry