Q. When a nitrogenous substance $X$ is treated with nitrous acid, a blue colour is obtained. The compound $X$ can be:

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A

$CH _{3} CH _{2} NO _{2}$

B

$\left( CH _{3}\right)_{2} CHNO _{2}$

C

$CH _{3} CH _{2} ONO$

D

$\left( CH _{3} CH \right)_{2} ONO$

Solution:

Correct answer is (b) $\left( CH _{3}\right)_{2} CHNO _{2}$

Questions from Amines

1. Which one of the following is not a primary amine?

KEAM 2012

2. Which one of the following reagent will convert acetamide to ethanamine?

KEAM 2014

3. Which of the following will not give a primary amine?

AMU 2013

4. Which one of the following isomeric amines has the highest boiling point?

KEAM 2014

5. The amine that reacts will Hinsberg's reagent to give an alkali insoluble product is :

NEET 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

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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 $1$]

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 $HBr$ ?

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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
[Given that molecular mass of NaOH = 40 g mol$^{-1}$]

NEET 2019 Some Basic Concepts of Chemistry

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