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प्रश्न
Give the chemical test to distinguish:
Formaldehyde and acetaldehyde
उत्तर
Formaldehyde and acetaldehyde
Acetaldehyde, when heated with I2 and NaOH, gives a yellow precipitate of iodoform (Iodoform test) whereas formaldehyde does not give a yellow precipitate of iodoform.
\[\ce{\underset{\text{Acetaldehyde}}{CH3CHO} + 4NaOH + I2 ->[\Delta]\underset{\text{Iodoform}}{CHI3} + HCOONa + 3H2O + 3NaI}\]
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संबंधित प्रश्न
Write the reaction to prepare acetaldehyde from hydrogen gas and acid chloride.
How can the following conversions be brought about:
Acetaldehyde to acetaldehyde phenyl hydrazone.
How can the following conversion be brought about:
Acetaldehyde to propan-2-ol.
Match the following:
| (i) Molal depression constant | (a) Infinite dilution |
| (ii) Acetaldehyde | (b) mol L-1 sec-1 |
| (iii) Rate of reaction | (c) Iodoform |
| (iv) Optical activity | (d) K kg mol-1 |
| (v) Kohlrausch’s law | (e) Lactic acid |
Fill in the blanks by choosing the appropriate word(s) from those given in the brackets:
(two, four, sec-1, diamagnetic, acetaldehyde, mol-1L sec-1, paramagnetic, formaldehyde, acetone, ethanol)
Calcium formate on distillation gives ______ but the distillation of calcium formate and calcium acetate gives ______.
How will you bring about the following conversion? (Give equation).
Formaldehyde to urotropine
How will the following be converted? (Give chemical equation)
Acetaldehyde to acetone
Give a chemical reaction to convert acetaldehyde into secondary propyl alcohol.
