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Q. Chemistry Question Image

Aldehydes Ketones and Carboxylic Acids Report Error

Solution:

Protection of two $-OH$ group by $PhCHO$, formation of hemiacetal.

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Questions from Aldehydes Ketones and Carboxylic Acids

1.
This reaction is called

AMU 2012

2. Toluene by Etard's reaction gives

UP CPMT 2012

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

UP CPMT 2010

4. Acetaldehyde can be prepared by

UP CPMT 2011

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

AIIMS 2019

Chemistry Most Viewed Questions

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

NEET 2020

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 $114 \,g\, mol^{-1}]$

NEET 2020 Solutions

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 $1$]

NEET 2021 Some Basic Concepts of Chemistry

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 $HBr$ ?

NEET 2020

5. The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is
[Given that molecular mass of NaOH = 40 g mol$^{-1}$]

NEET 2019 Some Basic Concepts of Chemistry

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