1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the following do not undergo base catalysed aldol condensation?

Q. Which of the following do not undergo base catalysed aldol condensation?

Aldehydes Ketones and Carboxylic Acids Report Error

Solution:

Correct answer is (b) 2 ,2- dimethyl propionaldehydeCorrect answer is (c) BenzaldehydeCorrect answer is (d) $p$-methylbenzaldehyde

Questions from Aldehydes Ketones and Carboxylic Acids

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.

AIIMS 2019

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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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3. An organic compound contains $78 \%$ (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of $C$ is $12, H$ is $1$]

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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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