1. Tardigrade
  2. Question
  3. Chemistry
  4. When CH 3 CHO is reacted in the presence of a base with excess of HCHO, which statement is true?

Q. When $CH _{3} CHO$ is reacted in the presence of a base with excess of $HCHO$, which statement is true?

Aldehydes Ketones and Carboxylic Acids Report Error

Solution:

Correct answer is (c) First aldol-type and then Cannizzaro-type reaction takes place.

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1.
This reaction is called

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2. Toluene by Etard's reaction gives

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3. The reduction of benzoyl chloride with $H_2/Pd\, BaSO_4$ gives

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4. Acetaldehyde can be prepared by

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5. Assertion : Glyceraldehyde reacts with $Br_2/ H_2O$ to form achiral compound.
Reason : $-CHO$ and $-CH_2OH$ both are oxidised.

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1. If for a certain reaction $\Delta_{r}H$ is $30\, kJ\, mol^{-1}$ at $450 \,K$, the value of $\Delta_{r}S$ (in $JK^{-1}\, mol^{-1})$ for which the same reaction will be spontaneous at the same temperature is

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2. If $8\,g$ of a non-electrolyte solute is dissolved in $114\, g$ of n-octane to reduce its vapour pressure to $80\%$, the molar mass (in $g \,mol^{-1})$ of the solute is [Given that molar mass of n-octane is $114 \,g\, mol^{-1}]$

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4. At standard conditions, if the change in the enthalpy for the following reaction is $-109 \,kJ\, mol^{-1}$ $H_{2(g)}+Br_{2(g)} \to 2HBr_{(g)}$ Given that bond energy of $H_{2}$ and $Br_{2}$ is $435\,KJ\,mol^{-1}$ and $192\,KJ\,mol^{-1}$ , respectively, what is the bond energy (in $KJ \,mol^{-1})$ of $HBr$ ?

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5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is
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