AIIMS Chemistry Class 11 Questions

If energy of electron in ground state is −13.6 then find out speed of electron in fourth orbit of H⁻atom

If energy of 15 eV is given to electron in $4^{th}$ orbit then find it's final energy when it comes out of H⁻atom.

An electron is revolving in n = 3 orbit. What will be the magnetic field at the centre of hydrogen atom?

An electron collides elastically with H⁻like atom and excites it from ground state to n = 3. Find out the energy transfer to H⁻like atom

At which excited state of $\text{Be}^{3+}$ radius of $\text{e}^-$ will be same as $\text{H}$ atoms and electron in ground state.

Assertion: For revolving electron, direction of angular momentum and magnetic moment are opposite.

Reason: Charge of electron is negative.

Energy of electron (in eV) in $2^{\text{nd}}$ orbit of $\text{He}^+$ ion?

Assertion: For an element generally N ≥ Z (N=number of neutrons, Z= atomic number) Reason: Neutrons always experience attractive nuclear force.

Assertion: Hydrogen atom consists of only one electron but its emission spectrum has many lines. Reason: Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

Assertion : Hydrogen atom consists of only one electron but its emission spectrum has many lines.

Reason : Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

The complete reaction is shown below.

IUPAC name of

The complete reaction is shown below.

$\text{A} \xrightarrow{\text{Ph}-\text{SO}_2\text{Cl}} \text{B} \xrightarrow{\text{KOH}} \text{C} \xrightarrow{\text{C}_2\text{H}_5\text{I}} \text{D}$'C' is water solubleCorrect structure of A and D are

Correct order of SN2 reaction is:

Stability order of following carbocation is :

Find the end product of reaction

$\text{Ph}-\text{CH}_2-\text{CH}=\text{CH}-\text{CH}_3 \xrightarrow[\text{(ii) Alk. KOH}]{\text{(i) Br}_2}$

Assertion: Phenol is more acidic then m-methoxy phenol Reason: $\text{–OCH}_3$ shows +I effect

Compare stability of free radicals

(I) $\text{CH}_3-\dot{\text{C}}\text{H}-\text{CH}_3$

(II) $\text{C}_6\text{H}_5-\dot{\text{C}}\text{H}_2$

(III)$\dot{\text{C}}\text{H}_2-\text{CH}(\text{CH}_3)_2 \qquad \text{(IV) }\dot{\text{C}}\text{H}_2-\text{CH}_3$

$\text{Phenol} + \text{Aniline} \xrightarrow{\text{C}_6\text{H}_5\text{N}_2^+\text{Cl}^- / \text{KOH}} \text{Major Product: Product will be :}$

Write IUPAC name of following compound

$-\text{NH}-\text{C}(=\text{O})-\text{NH}-\text{NH}_2\text{ group}\rangle \xrightarrow{\text{(i)HCl} / \text{(ii)}\Delta} \text{Major product of following reaction}$

Assertion: Propene reacts with HI in presence of peroxide give¹⁻iodopropane. Reason: 1° free radical is less stable than 2° free radical

Identify structure of ‘P’ and ‘Q’ Correct order of pKa value is:

$\langle\text{1-chloro-2-methoxybenzene structure}\rangle \xrightarrow{\text{HNO}_3 / \text{H}_2\text{SO}_4} \text{Major Product, product will be :}$

Correct order of basic strength is:

Which of the following statement is correct for oleum ?

IUPAC name of give compound:

How many spectral line of Balmer series present in visible region :

Assertion: Anhydrides are more reactive than ester for nucleophilic substitution.

Reason:– $\text{R.COO}^{-}$ is better leaving group than $\text{R-O}^{-}$

Suitable reagent for following conversion

The complete reaction is shown below.

Assertion: m-Bromotoluene can be prepared by m-toluidene.

Reason: Amino group is meta directing

The complete reaction is shown below.

The complete reaction is shown below.

If HBr attacks on left side double bond of the conjugated diene, then the formation of tertiary carbocation occur which is highly stable and if HBr attacks on right side double bond, the formation of secondary carbocation occurs which is less stable.

The complete reaction is shown below.

$\text{CH}_3-\text{C}\equiv\text{CH} \xrightarrow{\quad2\text{HBr}\quad} \longrightarrow \xrightarrow{\quad\text{H}_2\text{O}\quad} \text{Product , Product is:}$

Which of the following has highest ratio of reducing hydrogen / OH :

Which of the following number of lone pair at central atom zero $\text{XeO}_3$,$\text{XeO}_2\text{F}_2$, $\text{XeO}_4$, $\text{XeO}_3\text{F}_2$, $\text{Ba}_2\text{XeF}_4$

1 mole of a diatomic is heated through isochoric process from 300 k to 500 K. The entropy is :

Assertion : $\text{BO}_3^{3-}$ and $\text{SO}_3^{2-}$ are not isostructural.

Reason : In $\text{SO}_3^{2-}$, sulphur has one lone pair of electrons.

Assertion : Air that quickly leaks out of a balloon becomes cooler.

Reason : The leaking air undergoes adiabatic expansion.

Formula of metal oxide with metal deficiency defect in its crystal is $\text{A}_{0.8}\text{O}$ . The crystal contains $\text{A}^{2+}$ and $\text{A}^{3+}$ ions. The fraction of metal existing as $\text{A}^{2+}$ ions in the crystal is -

$\text{H}_2\text{O}_2$ is obtained by which of the following:

In $\text{Fe(CO)}_5$, the $\text{Fe--C}$ bond possesses

In which of the following pair both the species have $sp^3$ hybridization?

The chemical reaction is shown below:

If n = 2 for $\text{He}^+$ ion than find out the wave length

Assertion : The name of the hydrocarbon $(\text{CH}_3)_2\text{CHCH}_2\text{CH}_2\text{CH}(\text{CH}_3)\text{CH}_2\text{CH}_3$ is 2,5-dimethylheptane and not 3,6-dimethylheptane.

Reason : Numbering should be done in such a way that the sum of the locants on the parent chain is the biggest possible number.